question

A substance that is made up on only one kind of atam is a(an)

answer

element

question

What is the symbol for aluminum

answer

Al

question

The symbol for gold is

answer

Au

question

If a material contains two or more elements joined in a fixed proportion, it is a

answer

compound

question

Water is a compound because it

answer

always has two hydrogen atoms for each oxygen atom

question

Which of the following is a mixture?

answer

salad at Dr. Lofton's house

question

Which of the following is a characteristic of a mixture?

answer

has varying properties

question

A mixture that appears to be the same throughout is a

answer

homogeneous mixture

question

Which of the following is a heterogeneous mixture

answer

a jar of mixed nuts

question

A mixture can be classified as a solution, suspension, or colloid based on the

answer

size of its larges particles

question

You are about to open a container of soy milk but notice that there are instructions to "shake well before serving." The soy milk is most likely a

answer

solution

question

Which of the following is malleable

answer

gold

question

Which of the following has the highest viscosity

answer

corn syrup

question

A substance has a melting point of 0 degree Celsius and a boiling point of 100 degree Celsious. The substance is most likely

answer

water

question

A material that is malleable and conducts electricity is most likely

answer

a metal

question

What physical properties of nylon and leather make them good materials to use for shoelaces?

answer

durability and flexibility

question

Which of the following materials is useful for making molds because it has a low melting point

answer

wax

question

Filtration can be used to separate mixtures based on

answer

the size of their particles

question

When a physical change in a sample occurs, which of the following does NOT change?

answer

composition

question

Which of the following is a physical change?

answer

sawing a piece of wood in half

question

Flammability is a material's ability to burn in the presence of

answer

oxygen

question

A substance that has high reactivity

answer

easily combines chemically with other substances.

question

Which of the following is NOT a clue that a chemical change has occurred?

answer

change in shape

question

Which of the following is a chemical change?

answer

Water breaking down into hydrogen and oxygen

question

Which of the following is a clue of a chemical change?

answer

a gas forms when vinegar and baking soda are mixed

question

Three examples of physical change are

answer

boiling water, bursting a balloon, and crumpling a piece of paper

question

The shape of an apple is a

answer

physical property

question

Fog is an example of a colloid

answer

question

The scattering of light by colloids is called

answer

the Tyndall effect

question

When two or more substances are combined so each substance can be separated by physical means, the result is a

answer

mixture

question

_______ is another name for a homogeneous mixture

answer

solution

question

When a log burn in fire,

answer

a chemical change has occurred

question

You put 1 gram of sale into 1 liter of water and stir. The resulting liquid is an example of

answer

a homogeneous mixture

question

The smallest unit of a substance that behaves like the substance is

answer

a compound

question

The Law of Conservation of Mass states that mass cannot be

answer

created or destroyed

question

Which of the following is NOT an example of a physical property?

answer

reacts with other substances

question

Sodium and chlorine combining to form table salt is an example of a _____

answer

chemical change

question

Digestion food is an example of a _____

answer

chemical change

question

Which of the following is NOT an element?

answer

water

question

Which of the following is NOT a phase of matter?

answer

Compound

question

According to composition, matter is classified as

answer

elements, compounds, mixtures, and solutions

question

If a material contains two or more elements joined in a fixed proportion, it is a

answer

compound

question

What is the symbol for silver?

answer

Ag

question

Water is a compound because it

answer

always has two hydrogen atoms for each oxygen atom

question

Formation of a precipitate is usually evidence of

answer

a chemical change

question

A piece of wood that measures 72 cm to the third power and has a mass of 80.0 grams. What is the density of the wood?

answer

1.1 g/cm to the third power

question

What is the density of a piece of wood that has a mass of 25.0 grams and a volume of 29.4 cm to the third power?

answer

0.85 g/cm to the third power

question

An ice cube measuring 195.11 cm to the third power and has a density of 0.917 g/mL. What is the mass?

answer

212.77g

question

The density of aluminum is 2.70 g/mL. If the mass of a piece of aluminum is 244 grams, what is the volume of the aluminum?

answer

658.8mL

question

The volume of a solution was measured in a graduated cylinder (shown above). If the mass of solution is measured to e 60.75 Grams, what is the density of the solution?

answer

13.5g/mL

question

In a _______ mixture, the parts of the mixture are noticeably different from one another.

answer

heterogeneous

question

_______ is the amount of space an object takes up.

answer

volume

question

_____ is anything that takes up space and has mass and volume.

answer

matter

question

______ is the amount of matter in an object.

answer

mass

question

The hardest known material is a ______

answer

diamond

question

_______is another word for characteristic

answer

property

question

______ means to group according to similar properties.

answer

classify

question

_______ is a shorthand way to represent an element

answer

chemical symbol

question

A piece of white pine wood has a density of 0.430 g/cm to the third power. What is the mass of 150 cm to the third power of this wood?

answer

64.5 g

question

What is the density of a metal if 38.6 g of the metal occupy a volume of 2.0 cm to the third power?

answer

19.3 g/cm to the third power

question

Measuring ______ can be used to test the purity of some substances.

answer

density

question

______ is the smallest particle of a compound that has all the properties of the compound

answer

molecule

question

_______ is a shorthand way of representing a compound

answer

chemical formula

question

_______ is the smallester particle of an element that has all the properties of that element.

answer

Atom

question

According to John Dalton's observations, when elements combine in a compound,

answer

the ratio of their masses is always the same

question

What does the electron cloud model describe

answer

the most likely locations of electreons in atoms

question

Which of the following is unique for any given element?

answer

The number of protons

question

Who provided evidence for the existence of a nucleus in an atom?

answer

Ernest Rutherford

question

Democritus thought that matter was made of tiny particles

answer

that could not be divided

question

What can you assume has happened if an electron moves to a higher energy level?

answer

The electron has gained energy

question

The Greek philosopher Democritus coined what word for a tiny piece of matter that cannot be divided?

answer

atom

question

To find the number of neutrons in an atom, you would subtract

answer

atomic number from mass number.

question

The number of protons in one atom of an element is that element's

answer

atomic number

question

Which of the following most accurately represents John Dalton's model of the atom?

answer

a tiny, solid sphere with a predictable mass for a given element

question

What is the difference between an atom in the ground state and an atom in an excited state?

answer

The atoom in an excited state has more energy and is less stable than the atom in the ground

question

Which subatomic particle has a negative charge?

answer

electron

question

J. J. Thomson's experiments provided evidence that an atom

answer

contains negatively charged particles

question

In Niels Bohr's model of the atom, electrons move

answer

like planets orbiting the sun

question

What do scientists use to predict the locations of electrons in atoms?

answer

probability

question

The nuclei of isotopes contain different numbers of ______

answer

neutrons

question

The nickname of Thomson's model of the atom is

answer

plum pudding

question

When all the electrons in an atom are in orbitals with the lowest possible energy, the atom is in its _______ state.

answer

ground

question

The fourth energy level of the atom can hold up to _____ electrons.

answer

32

question

_________ is the number of protons in the nucleus of the atom

answer

atomic number

question

The scientist who discovered the small, dense nucleus is _______

answer

Rutherford

question

______ is the number of protons plus neutrons in the nucleus of the atom.

answer

mass number

question

The possible energies that electrons in an atom can have are called

answer

energy levels

question

The second energy level of the atom can hold up to _____ electrons

answer

18

question

__________ is evidence you get without actually seeing or touching the object

answer

indirect evidence

question

According to ______, all matter was made up to four elements - earth, air, fire, and water.

answer

Aristotle

question

The region in which an electron is most likely to be found is called an

answer

orbital

question

Protons and electrons have a charge of ______ (exact charge).

answer

1+

question

The central portion of the atom is called the

answer

nucleus

question

Another name for the wave model of the atom is the _____ model.

answer

electron cloud model

question

There are ______ possible p orbitals.

answer

3

question

Electrons have a _____ charge.

answer

negative

question

The atom as a whole has a _____ charge.

answer

neutral

question

An atom in which an electron has moved to a higher energy level is in a(an _____ state.

answer

excited

question

The weakest electrons in an atom are located __________

answer

near the nucleus

question

There is/are _____ possible s orbital(s).

answer

1

question

Locate oxygen on your periodic table. It has ____ protons in its nucleus

answer

8

question

There are _____ possible d orbitals

answer

5

question

The third energy level of the atom can hold up to ______ electrons.

answer

18

question

The four main orbitals are ________

answer

spdf

question

Neutrons have a _____ charge

answer

negative

question

Locate argon on your periodic table. Its chemical symbol is _____

answer

Ar

question

______ was the Greek philosopher who named the smallest piece of matter the atom.

answer

Democrites

question

The word atom means _______

answer

indivisible or uncut

question

The nucleus has a _____ charge.

answer

positive

question

Find Chlorine on your periodic table. Its atomic number is

answer

17

question

There are _____ types of f orbitals

answer

7

question

_______ is atoms of the same element with the same atomic number, but different mass number

answer

isotope

question

The first energy level of the atom can hold up to _____ electrons.

answer

2

question

The scientist who thought the atom was mostly empty space is _____

answer

Democrites

question

The subatomic particle that J.J. Thomson discovered has a(an) ______ charge.

answer

negative

question

Protons have a _____ charge

answer

positive

question

______ are electrons in the outermost energy level of the atom.

answer

Valence electrons

question

If element Q has 11 protons, its _____ is 11

answer

atomic number

question

Which of the following gases emit colors when an electric current is applied?

answer

argon and krypton

question

Which of the following Group 7A elements is the most reactive?

answer

I (iodine)

question

Among the alkali metals, the tendency to react with other substances

answer

increases from top to bottom within the group

question

Atoms of the most reactive elements tend to have

answer

one or seven valence electrons

question

Mendeleev arranged the known chemical elements in a table according to increasing

answer

atomic mass

question

Figure 5-1 shows a portion of a blank periodic table. Idenify the segments labeled A and B

answer

A is a period and B is a group

question

Which element is found in most of the compounds in your body except for water?

answer

carbon

question

Which element is found in nature only in compounds?

answer

sodium

question

One twelfth the mass of a carbon-12 atom is used to define a(an)

answer

atomic mass unit

question

To keep them from reacting, some highly reactive elements are stored in

answer

argon

question

Elements that are gases, are brittle, and are poor conductors at room temperature are _____

answer

nonmetals

question

Moving from left to right across a row of the periodic table, which of the following values increases by exactly one from element to element?

answer

atomic number

question

A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is

answer

56

question

The special unit used to measure the mass for subatomic particles and for atomic mass is

answer

amu

question

The atomic mass of an element is

answer

a ratio based on the mass of a carbon-12 atom

question

Which list of elements contains only metals?

answer

tin, copper, cesium

question

Which general statement does NOT apply to metals?

answer

Most metals are brittle

question

Which halogen is most likely to react?

answer

F (fluorine)

question

Horizontal rows of the periodic table are called _____

answer

periods

question

The tendency of an element to react is closely related to

answer

the number of valence electrons in atoms of the element

question

Which of the following Group 1A elements is the most reactive?

answer

Cs(cesium)

question

A chemical symbol represents the _____ of an element

answer

name

question

A member of the boron family has three valence electrons, while a member of the nitrogen family has

answer

five

question

At room temperature, none of the metals are

answer

gases

question

All of the elements in Family 18 are _____

answer

gases

question

The number at the bottom of the key on the periodic talbe is the _______

answer

atomic mass

question

No two elements can have the same _______

answer

atomic number

question

All of the acitinoids are ______

answer

radioactive

question

The number of _______ dewtermines an elements chemical properties.

answer

valence electrons

question

Today's periodic table is arranged according increasing ______

answer

atomic number

question

What is the charge of the elements in group 2A after a chenmical bond is ______

answer

2+

question

When your textbook was written, there were _____ known elements.

answer

113

question

On the periodic table most of hte elements are _______

answer

metals

question

The pattern of repeating properties of elements revealed in the periodic table is known as the ______

answer

periodic law

question

The element in group 2 that is used in cancer treatment is _______

answer

Radium

question

The element is family 16 that will combine with almost every element on the periodic table is ___.

answer

Oxygen

question

The zigzag line on the periodic table separates the _____ froom the _____.

answer

metals/nonmetals

question

The element in Group 5A that is found in Fertilizers and the tips of matches is_____

answer

Arsenic

question

The rows indicate how many ___ each element in row contains.

answer

energy levels

question

One way to demonstrate reactivity among the alkaline earth metals, Group 2A, is to obsere what happens when they are placed in ______

answer

water

question

A 12-karet gold item is _____ percent pure

answer

50

question

The charge of each titanium ion in the ionic compund TiO 2 is ____

answer

4

question

You are given the melting points of three unknown substances and are asked to predict which one is an ionic compound. You would select the compound with the ___ melting point.

answer

highest

question

The purity of gold is expressed in units called ___

answer

karets

question

In an electron dot diagram, each dot represents a(an)

answer

valence electron

question

In ionic compounds, the sum of the charges of all the cations and anions must be

answer

0

question

A polar bond forms when ___ not shared equally

answer

electrons

question

Which of the following is a typical property of an ionic compound?

answer

poor conductor of electric current when melted

question

An alloy that contains mainly iron and carbon is

answer

stainless steel

question

The compound whose formula is SO 3 is called ____

answer

sulfur oxide

question

What is the formula for copper (II) nitrate? Note: nitrate has a 1- charge

answer

Cu(NO 3) 2

question

Among the elements potassium, lithium, and iron, the metallic bonds are likely to be strongest in

answer

iron

question

Which of the following statements correctly describes the substance with teh formula KI?

answer

There is a one-to-one ratio of potassium ions to iodide ions

question

Gold that is 100 percent pure is labeled ____ karet gold

answer

24

question

Two factors that determine whether a molecule is polar are the types of atoms in the molecule and the _____ of the molecule

answer

composition

question

In the compound MgCI 2, the subscript 2 indicates that

answer

there are two chloride ions for each magnesium ion

question

The name iron (II) indicates that a compound contains

answer

iron ions with a 2+ charge

question

In an electron dot diagram, the symbol for an element is used to represent

answer

the nucleus and all non-valence electrons

question

Which phase BEST describes a metallic bond?

answer

the attraction between a metal cation and a shared pool of electrons

question

In an ionic compound, the attractions between cations and _____ hold the compound together

answer

anions

question

The water mulecule H20 is polar because it contains two polar single bonds and

answer

its molecule has a bent shape

question

Ionization energies tend to

answer

decrease from the bottom of a group to the top

question

KBr is the formula for an ionic compound. The fact that neither symbol is followed by a subscript means that there is a(an) _____ ratio of ions in the compound.

answer

1:1

question

A _____ is a neutral group of atoms tha tare joined together by one or more covalent bond.

answer

molecule

question

You see a structural formula in which the symbols for elements are connected by a long dash. You can assume that the chemical bonds in the compound are

answer

covalent

question

Beryllium, Be, and chlorine, Cl, form a binary ionic compound with a one-to-two ratio of beryllium ions to chloride ions. The formula for the compound is

answer

BeCl subscript 2

question

Which of the following formulas represents a compound whose molecules contain a triple bond?

answer

N=N

question

In the binary ionic compound potassium bromide, KBr, the element that forms cations is _____

answer

potassium

question

Typically, atoms gain or lose electrons to achieve

answer

a stable electron configuration

question

The chemical formula for calcium chloride, CaCl subscript 2, shows that the compound contains two ___ ions for every ______ion

answer

chlorine; carbon

question

When cesium and fluorine react, they form an ionic compound called

answer

cesium fluoride

question

Each pair of shared electrons in a structural formula is represented by a

answer

dash

question

Which statement best describes the properties of sodium chloride

answer

liquid sodium chloride is a good conductor of electric current

question

The chemical formula for the ionic compound consisting of oxygen and nickel (III) is

answer

Ni2O3

question

In the name carbon dioxide, the prefix of the second word indicates that a molecule of carbon dioxide contains

answer

two oxygen atoms

question

Metallic bonding is similar to ionic bonding because

answer

there is an attraction between positively charged and negatively charged particles

question

In its simplest form, the allow brass consists of zinz and

answer

copper

question

A(An) ion is a covalently bonded group of atoms that has a positive or negative charge

answer

polyatomic

question

A ____ is a mixture of two or more leements, at least one is a metal

answer

alloy

question

A compound whose molecules contain one boron atom and three fluorine atoms would be named

answer

boron trifluoride

question

A compound consisting of bromine and cadmium (2+) would be named

answer

cadmium (II) bromide

question

The formation of an ionic bond involves the

answer

transfer of electrons

question

A _____ is a negatively charged ion

answer

anion

question

A compound whose molecules contain one carbon atom and 8 sulfur atoms would be named

answer

carbon octasulfide

question

How does increasing the amount of carbon in steel affect its properties?

answer

Carbon makes the lattice harder and stronger

question

Alkali metals, alkaline earth metals, and aluminum all form ions with positive charges equal to the

answer

group number

question

When two atoms of the same nonmetal react, they often form a(an)

answer

diatromic molecule

question

If there are two long dashes between two atoms in a structural formula, molecules of the compound contain a(an) ____ bond.

answer

double

question

To produce stainless steel, steelmakers add

answer

chromium

question

Which of the following groups contain three elements with stable electron configurations

answer

helium, xenon, neon

question

Fluorine, F, forms a binary ionic compound with lithium, Li. What is the name of this compound?

answer

lithium fluoride

question

In general, the more ___ a metal has, the stronger its metallic bonds will be

answer

protons

question

A(an) ____ is a positively charged ion

answer

cation

question

In a metal lattice, _____ are surrounded by a pool of shared electrons.

answer

cations

question

In a polar covalent cond

answer

electrons are shared equally between atoms

question

______ means two atoms of the same element covalently bonded together

answer

diatomic

question

The ions in solid sodium chloride are arranged in a structure called a(an) ____ lattice

answer

crystal

question

The elements most likely to form more than one type of ion are the

answer

transition metals

question

The substances that undergo change in a chemical reaction are called

answer

reactants

question

Hydrochloric acid, HCL, is added to solid NaOH. After the reaction is complete, NaCl dissolved in water remains. What are the products of

answer

NaCl and H20

question

Which of the following does NOT state what the arrow means in a chemical equation?

answer

conserves

question

Which of the following does NOT show the law of conservation of mass?

answer

2 atoms of Mg react with 1 molecule of O2 to produce 2 units of MgO.

question

Which of the following is a chemical equation that accurately represents what happens when sulfur and oxygen react to form sulfur trioxide

answer

S and O2 produce SO3

question

How many moles of He are in 16 g of the element?

answer

4.0 mol

question

An industrial process makes calcium oxide by decomposing calcium carbonate. Which of the following is NOT needed to calculate the mass of calcium oxide that can be produced from 4.7 kg of calcium carbonate?

answer

the volume of the unkkonwn mass

question

The coefficients in a balanced chemical equation always can express the ratio of

answer

moles of reactants and products

question

When magnesium carbonate, MgCO2, reacts with nitric acid, HNO3, magnesium nitrate and carbonic acid form. Carbonic acid then breaks down into water and carbon dioxide. Which two types of reactions take place in this process

answer

double-replacement and decomposition

question

Which of the following is NOT always true about a synthesis reaction?

answer

There is only one reactant

question

Which of the following takes place during a redox reaction?

answer

Electrons are both gained and lost

question

In a chemical reaction, an iron atom became the iron Fe2+. What happened to the iron atom?

answer

It lost electrons and was oxidized.

question

In a compound, chemical energy is contained in the

answer

bonds

question

Which of the following statements is true about what happens during a chemical reaction?

answer

Bonds of the reactants are broken, and bonds of the products are form.

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