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Multiple Choice Quiz
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1

Which of the following cannot be broken down to anything simpler?
A)water
B)table salt
C)silver
D)sugar
2

Elements combine in fixed mass ratios to form compounds. This must mean that elements
A)are made up of continuous matter without subunits.
B)are composed of discrete units called atoms.
C)have unambiguous atomic numbers.
D)are always chemically active.
3

The first part of an atom to be discovered was the
A)proton.
B)neutron.
C)electron.
D)nucleus.
4

The electron was discovered through experiments with
A)electricity.
B)light.
C)radio waves.
D)radioactivity.
5

The nucleus was discovered through experiments with
A)electricity.
B)light.
C)radio waves.
D)radioactivity.
6

The planetary model of an atom, with the nucleus playing the role of the Sun and the electrons playing the role of planets, is unacceptable because
A)the electrical attraction between a proton and an electron is too weak.
B)an electron is accelerating and would lose energy.
C)the nuclear attraction between a proton and an electron is too strong.
D)none of these because the planetary model is acceptable.
7

Most of the volume of an atom is occupied by
A)electrons.
B)protons.
C)neutrons.
D)empty space.
8

The atomic number of an atom identifies the number of
A)protons.
B)neutrons.
C)quantum orbits.
D)excited states.
9

The Bohr model of the atom was able to explain the Balmer series because
A)larger orbits required electrons to have more negative energy in order to match the angular momentum.
B)differences between the energy levels of the orbits matched the difference between energy levels of the line spectra.
C)electrons were allowed to exist only in allowed orbits and nowhere else.
D)none of the above.
10

The idea of matter waves, as reasoned by de Broglie, describes a wave like behavior of any
A)particle, moving or not.
B)particle that is moving.
C)charged particle that is moving.
D)particle that is stationary.
11

According to the equation de Broglie derived to describe matter waves, doubling the velocity of an electron would result in
A)less momentum.
B)a greater mass.
C)a smaller wavelength.
D)an unchanged wavelength and mass.
12

A hydrogen atom has an electron in the sixth excited state so the principal quantum number of this electron is
A)7.
B)6.
C)5.
D)4.
13

One reason the Bohr model of the ultimately atom failed was because it did not explain why
A)accelerating electrons do not emit electromagnetic radiation.
B)moving electrons have a greater mass.
C)electrons in the orbits of an atom have negative energies.
D)electrons in greater orbits of an atom have greater velocities.
14

A hydrogen atom is in a ground state when its electron
A)has moved away from the atom to the ground.
B)has stopped moving.
C)is moving back and forth through the nucleus.
D)remains at the lowest energy level.
15

An atom of hydrogen emits a photon when its electron
A)jumps from a lower-energy orbit to a higher-energy orbit.
B)jumps from a higher-energy orbit to a lower-energy orbit.
C)combines with a proton.
D)combines with a neutron.
16

What is the energy of a photon of black light (ultraviolet) that has a frequency of 2.00 × 1016 Hz?
A)1.33 × 10-17 J
B)13.26 × 1018 J
C)1.33 × 1051 J
D)3.05 ×10-19 J
17

What is the de Broglie wavelength of an electron with a velocity of 2.00 × 107 m/s?
A)1.82 × 10-23 m
B)1.21 × 10-10 m
C)3.64 × 10-11 m
D)3.32 × 10-41 m
18

What is the frequency of a photon emitted when an electron in a hydrogen atom jumps from n = 3 to n = 2?
A)3.02 × 10-19 Hz
B)4.56 × 1014 Hz
C)7.29 × 1014 Hz
D)6.2 × 1014 Hz
19

What is the electron configuration for potassium (atomic number 19)?
A)1s22p63s43p64s2
B)1s42p63s23p64s2
C)1s22s22p63s23p64s1
D)1s22s22p63s23p8
20

What is the energy of a photon of red light with a frequency of 4.00 × 1014 Hz?
A)1.66 × 10-48 J
B)2.65 × 10-19 J
C)6.63 × 10-34 J
D)4.00 × 1014 J
21

Isotopes are atoms of an element with identical chemical properties but with different
A)numbers of protons.
B)masses.
C)numbers of electrons.
D)atomic numbers.
22

The masses of all isotopes are based on a comparison to the mass a particular isotope of
A)hydrogen.
B)carbon.
C)oxygen.
D)uranium.
23

The sum of the number of protons and neutrons in the nucleus of an atom is called the
A)atomic number.
B)atomic mass.
C)atomic weight.
D)mass number.
24

The weighted average of the masses of the stable isotopes of an element as they occur in nature is called the
A)atomic number.
B)atomic mass.
C)atomic weight.
D)mass number.
25

The modern periodic law is based on
A)atomic number.
B)atomic mass.
C)atomic weight.
D)chemical activity.
26

Each family, or group of elements in a vertical column of the periodic table has elements with chemical characteristics that are
A)exactly the same.
B)similar.
C)different.
D)exactly opposite.
27

Which of the following belongs to the alkali metal family of elements?
A)sodium
B)calcium
C)chlorine
D)neon
28

Which of the following belongs to the halogen family of elements?
A)sodium
B)calcium
C)chlorine
D)neon
29

Which of the following belongs to the noble gas family of elements?
A)sodium
B)calcium
C)chlorine
D)neon
30

An atom of an element belonging to the alkali metal family has
A)one outer shell electron.
B)two outer shell electrons.
C)all outer shell electrons but one.
D)all outer shell electrons.
31

An atom of an element belonging to the halogen family has
A)one outer shell electron.
B)two outer shell electrons.
C)all outer shell electrons but one.
D)all outer shell electrons.
32

An atom of an element belonging to the noble gas family has
A)one outer shell electron.
B)two outer shell electrons.
C)all outer shell electrons but one.
D)all outer shell electrons.





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