question

Indivisible

answer

Democritus coined the term atomos, meaning:

question

Number of valence electrons

answer

Elements in the same group of the peridoic table have the same:

question

Neutrons

answer

Atoms of the same element can have different numbers of _____.

question

Gas

answer

What state of matter has particles farthest apart?

question

Gas

answer

Which state of matter is characterized by particles that are far apart and moving randomly?

question

An element

answer

A substance that cannot be broken down into simpler substances is ________

question

Nucleus

answer

Where is most of the mass of an atom found?

question

Your professor's lecture

answer

Which of the following is not matter?

A. A pen
B. A notebook
C. The person sitting next to you
D. Your professor's lecture

question

C. 2H and 3H are isotopes of hydrogen

answer

Which of hte following is true about 2H and 3H?

A. 2H is a molecule containing 2 atoms of hydrogen, and 3H is a molecule containing 3 atoms of hydrogen

B. 2H has two neutron and 3H has tree

C. 2H and 3H are isotopes of hydrogen

D. 2H and 3H are the most common forms of hyrdrogen found in nature

question

A. 35 protons, 35 neutrons, and 35 electrons

answer

Which of the following would be the isotope bromine- 70? An atom with:

A. 35 protons, 35 neutrons, and 35 electrons

B. 34 protons, 36 neutrons, and 34 electrons

C. 33 protons, 37 neutrons, and 33 electrons

D. 35 protons, 70 neutrons, and 35 electrons

question

B. Sn

answer

Which of the following elements has the largest number of protons?

A. Fe

B. Sn

C. H

D. O

question

B. Oil-and-Vinegar salad dressing

answer

Which of the following is a heterogeneous mixture?

A. Apple Juice

B. Oil-and-vinegar salad dressing

C. Milk

D. Mayonnaise

question

A. 13 C 6

answer

Which shorthand represents a carbon atom with 7 neutrons?
A. 13
          C
      6

B. 6
        C
    13

C. 7
         C
     6

D. 6
         C
      7

question

B. Metals

answer

Most of the elements in the periodic table are:

A. Semiconductors

B. Metals

C. Radioactive

D. Gasses

question

B. Atoms of the same element can have different numbers of protons.

answer

Which of the following statements are false?

A. Atoms of the same element can have different numbers of neutrons.

B. Atoms of the same element can have different numbers of protons.

C. Atoms of the same element can have different mass numbers.

D. Atoms of two different elements can have the same number of neutrons.

question

C. A pond freezing over in the winter

answer

Which of the following is an example of a physical change?

A. Firewood burning

B. Hydrogen combining with oxygen

C. A pond freezing over in the winter

D. Fireworks going off

question

Chemistry

answer

____ is the study of matter, the physical substance of all materials, and its transformations.

question

Matter

answer

____ is defined as anything that occupies space and has mass.

question

Pure substance or mixture

answer

Matter can exist as either ____ or ___.

question

Pure substance

answer

A ____ contains a single type of particle.

question

Mixture

answer

A ____ contains more than one substance combined together.

question

An element

answer

One type of pure substance, called ____, contains only a single type of atom.

question

Compound

answer

A type of pure substance, ____, which contains two or more different types of atoms linked together.

question

Homogeneous

answer

A mixture whose components intermingle so that they are virtually indistinguishable.

question

Heterogeneous

answer

A mixture in which the individual components are obvious because they do not intermingle

question

Solids, Liquids, and gas

answer

What are the principle states of matter?

question

Liquid

answer

In general, the particles in a ___ are farther apart than the particles in a solid but closer together than the particles in a gas.

question

Solids

answer

___ have a definite volume and shape.

question

Liquids

answer

___ have a definite volume but no definite shape.

question

Gases

answer

____ have neither a definite volume nor a definite shape.

question

Physical change and Chemical Change

answer

Transformations of matter include both ___ change and ____ change.

question

Physical changes

answer

____ changes include changes in state, such as melting, freezing, boiling, and condensing.

question

answer

___ changes involve the creation of new substances.

question

Atoms

answer

____ are the building blocks of all matter.

question

Atoms

answer

_____ are the smallest units that retain the characteristics of an element.

question

Hundred

answer

There are about ______ different elements.

question

Compounds

answer

Atoms link to other atoms to form ______

question

Molecule

answer

_______ is the simplest unit of many compounds

question

Periodic table

answer

The _____ is used to organize the elements by recurring chemical properties.

question

group or family

answer

Elements in teh same vertical column of the periodic table have similar chemical properties and are said to be in the same ______

question

Metals = generally on the left
Nonmetals = right-hand side
Semi-metals = between the metals and nonmetals

answer

The ___ are generally located on the left hand side of the periodic table, the __- are on the right-hand side, and the ___ are between the two mentioned above.

question

Positive protons

Neutral neutrons

negative electrons

answer

Atoms are composed of positively charged ____, neutral ____, and negatively charged _____

question

Protons and neutrons have similar masses whereas electrons have a much smaller mass

answer

____ and ___ have similar masses, whereas ___ have a much smaller mass

question

Atomic number

answer

The number of protons in an element is the _____

question

Protons

answer

All atoms with the same number of ____ are from teh same element

question

protons plus neutrons

answer

The mass number is equal to the number of ___ plus the number of ____

question

Mass number

answer

The ____ can vary among different atoms of the same element.

question

Isotopes

answer

____ of the same element have the same number of protons but diff in the number of neutrons. They therefore have different mass numbers.

question

J.J. Thomson

answer

After ___ discovered the electron, the proposed the plum pudding model of the atom, in which teh electrons are embedded in a sphere of positive charge.

question

Ernest Rutherford

answer

_____ disproved the plum pudding model in his landmark experiment. he proposed a new atomic model that had all of the positive charge andmost of the mass inside a tiny central nucleus and the electrons outside the nucleus.

question

Electromagnetic radiation

answer

When energized, atoms emit different wavelengths of _____ that are characteristic of each element.

question

Niels Bohr

answer

___ used the fact that different wavelengths of electromagnetic radiation are emitted when elements are energized to propose a new model for the atom.

question

Energy levels

answer

In the solar system model, electrons circle the nucleus in orbits, which are also called ________

question

The Ground state

answer

Atoms normally exist in the _____, with electrons in the lowest energy levels possible.

question

An exciting state

answer

An electron can "jump" from lower energy levels to higher ones upon absorbing energy, creating _______.

question

Released

answer

When the electron returns to its original energy level, energy is ____

question

Electromagnetic radiation

answer

Because different atoms have different gaps between the energy levels, different atoms vary in the ______ of the electromagnetic radiation they release upon return to the ground state.

question

Orbitals

answer

_______ represent a volume of space where the electrons can be found.

question

orbitals

answer

Bohr's orbits were later replaced with ___

question

Orbitals

answer

Each energy level has a defined set of _____, the number of which varies depending on the energy level

question

Electronic Configuration

answer

The arrangement of electrons in orbitals is the _____ of an atom, which determines the chemistry of an atom.

question

Electrons fill the lower energy levels first

answer

To determine the electronic configuration of an atom, count up the number of electrons and then assign them to orbitals based on the following guidline:

Electrons fill the ____ levels first

question

An orbital holds no more than two electrons.

answer

To determine the electronic configuration of an atom, count up the number of electrons and then assign them to orbitals based on the following guidline:

An orbiatl holds no more than _____ electrons.

question

Electrons spread out among orbitals of equal energy rather than doubling up.

answer

To determine the electronic configuration of an atom, count up the number of electrons and then assign them to orbitals based on the following guidline:

Electrons spread out among orbitals ______ rather than doubling up.

question

The outer shell

answer

The highest occupied energy level.

question

Valence electrons

answer

The highest occupied energy level (the outer shell) contains the ________, which determine the chemistry of an atom

Chem 1020 – Everyday Chemistry – Iordanova Test Questions – Flashcards

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