mr. k final exam

question

Who believed there were only 4 elements (earth, wind, fire, and water)?
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Aristotle
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How many sodium atoms are present in this molecule? 7Na3PO4
answer

21
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Each vertical column on the periodic table is called a(an)
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family
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Ionic bonding involves the ________ of electrons.
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transferring
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What is the name of the compound CaI2?
answer

Calcium iodide
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Which change makes the chemical reaction occur faster?
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increasing the temperature
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What does the term “atom” mean?
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unable to be divided
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atomic number for neon
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10
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Which of the following is not an example of a physical change?
answer

burning a candle
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Mercury
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Hg
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Gold
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Au
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Helium
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He
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Plutonium
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Pu
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Magnesium
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Mg
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Carbon
answer

C
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Cobalt
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Co
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Nickel
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Ni
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Iron
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Fe
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Hydrogen
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H
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Copper
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Cu
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Oxygen
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O
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Nitrogen
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N
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Phosphorus
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P
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Potassium
answer

K
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Titanium
answer

Ti
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Tin
answer

Sn
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Aluminum
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Al
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Silicon
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Si
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Sulfur
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S
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Lead
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Pb
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Sodium
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Na
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Boron
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B
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Beryllium
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Be
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Francium
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Fr
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Cesium
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Cs
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Radon
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Rn
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Radium
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Ra
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Uranium
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Ur
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Zinc
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Zn
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What do atoms gain, lose, or share when they bond?
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electrons
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What type of compound is Be2NO3?
answer

ionic
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The most non-reactive family of elements is the
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noble gasses
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Which of the following is the electron configuration for calcium?
answer

2-8-8-2
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Which of the following chemical equations is balanced?
answer

2Ca + O2 –>2CaO
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What type a bond is formed when electrons are transferred from one atom to another?
answer

ionic
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As the molecules of water begin to slow down they go into a phase where they are no longer able to easily move past each other. The water is passing through a phase change and will
answer

remain a compound
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What type of compound is Cl4O3?
answer

covalent
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What type of equation is 2N2 + 2H2 ® 4NH3
answer

synthesis
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How many valence electrons does helium need to have a filled outermost energy level?
answer

2
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A chemical reaction that gives off energy in the form of heat is called a ____ reaction.
answer

exothermic
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How many electrons fill the outermost energy level of most atoms?
answer

8
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A student stirs 2 grams of salt into a cup of water. The student then tries to get the salt back by evaporating the water. In this experiment, the mass of salt recovered would be the same as the initial mass because?
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salt does not evaporate with water
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Most metals are
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solid at room temperature
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Which phase of matter has the most kinetic energy?
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gas
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Which phase of matter is represented by steam?
answer

gas
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How many valance electrons does magnesium have?
answer

2
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The smallest particle into which an element can be divided and still be the same substance is called an
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atom
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Most of the elements in the periodic table are
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metals
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Dalton believed that
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atoms of the same element are exactly alike
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Which element has the electron configuation 2, 8, 3?
answer

aluminum
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Which is an example of a chemical reaction?
answer

nails rusting
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In Thomson’s “chocolate chip cookie” model of the atom, the chocolate chips represent
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electrons
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Which type of element is most likely to gain electrons when it forms bonds?
answer

nonmetals
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Which of the following is not an example of a chemical change?
answer

salt dissolving
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How many protons are in one atom of lead?
answer

82
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Whose model resembled a billard ball?
answer

Dalton
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The elements along the zigzag line on the period table are called
answer

metalloids
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What is the name of the compound CO2?
answer

carbon dioxide
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In this model of the periodic table, a group of elements that are arranged in a vertical column is called a
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family
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In which region of the table would nonmetals be found?
answer

3
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What is the atomic mass for Tin?
answer

119
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What did Rutherford discover?
answer

protons
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Which of the following elements would be ductile and malleable?
answer

copper
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Which of the following is not one of the basic ideas of Dalton’s atomic theory?
answer

Atoms of different elements are exactly alike.
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Droplets of water forming on a bathroom mirror is the direct result of
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condensation
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Iron oxides, such as rust, form when iron metal reacts with oxygen in the air. What are the chemical symbols for the two elements found in iron oxide?
answer

Fe and O
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What are the only parts of an atom that make chemical bonds?
answer

valence electrons
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Which of the following represents the number of protons in an atom?
answer

atomic number
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Which method is the best way to find out whether a solution is an acid or base?
answer

Use litmus paper
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A calcium carbonate molecule has 1 calcium (Ca) atom, 3 oxygen (O) atoms, and 1 carbon (C) atom. Which of the following shows the chemical formula for calcium carbonate?
answer

CaCO3
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Where are electrons likely to be found?
answer

in energy levels
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Which of the following is found farthest from the center of an atom?
answer

electrons
question

What is the same within each family on the periodic table?
answer

number of valence electrons
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What is the charge of an atom that has 13 protons and 10 electrons?
answer

+3
question

When magnesium (Mg) metal is burned in the presence of oxygen (O2), magnesium oxide (MgO) is produced. The properties of magnesium oxide are different than the individual properties of magnesium and oxygen because magnesium oxide is
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a compound
question

The model shows the structural formula for methane. Which of these is the proper chemical formula for methan?
answer

CH4
question

The nucleus of an atom contains
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protons and neutrons
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Which of the following does not affect the rate of a chemical reaction?
answer

color
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How many atoms of oxygen are in one molecule of Mg(ClO)2?
answer

2
question

In which state of matter are the particles likely to be closest together?
answer

solid
question

Bonding that involves sharing of electrons within a molecule is called
answer

covalent bonding
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An atom of gold with 79 protons, 79 electrons, and 118 neutrons would have a mass number of
answer

197
question

Which of these elements would most likely be a shiny, gray-colored solid at room temperature, conduct electricity, and dent when hit with a hammer?
answer

aluminum
question

The picture shows one part of the periodic table of the elements. According to this information, how many protons does a carbon atom contain?
answer

6
question

What do the elements sulfur (S), nitrogen (N), phosphorus (P), and bromine (Br) have in common?
answer

they are nonmetals
question

Mr. K has a stomach that is upset. What could he take to make him feel better?
answer

something with a pH greater than 7
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Mrs. Hall tests an unknown substance with a pH meter. The liquid has a pH of 4. what type of substance is this liquid?
answer

acid

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