Question 1

Which element is in the same period as neon?

Accepted Answer

A)  F 
B)  Ar 
C)  Na 
D)  Br 
A)  F 
B)  Ar 
C)  Na 
D)  Br

Question 2

Elements in the same period have

Accepted Answer

A)  the same atomic number. 
B)  the same number of neutrons. 
C)  the same number of valence electrons. 
D)  none of the above 
A)  the same atomic number. 
B)  the same number of neutrons. 
C)  the same number of valence electrons. 
D)  none of the above

Question 3

Which type of radioactivity is an electron?

Accepted Answer

A)  alpha, α 
B)  beta, β 
C)  gamma, γ 
D)  lambda, λ 
A)  alpha, α 
B)  beta, β 
C)  gamma, γ 
D)  lambda, λ

Question 4

Define electrolysis and the purpose of the anode and the cathode.

Accepted Answer

Electrolysis is a chemical process that

Question 5

The element iron (Fe) occurs naturally as four isotopes. Each of these isotopes has

Accepted Answer

A)  26 protons. 
B)  26 electrons. 
C)  a different number of neutrons. 
D)  all of the above 
A)  26 protons. 
B)  26 electrons. 
C)  a different number of neutrons. 
D)  all of the above

Question 6

The isotope   P is also called

Accepted Answer

A)  phosphorus-15. 
B)  phosphorus-16. 
C)  phosphorus-31. 
D)  phosphorus-46. 
A)  phosphorus-15. 
B)  phosphorus-16. 
C)  phosphorus-31. 
D)  phosphorus-46.

Question 7

Rutherford concluded that the nucleus of an atom is positively charged because

Accepted Answer

A)  some negatively charged alpha particles were deflected by the nucleus in the gold foil experiment. 
B)  some positively charged alpha particles were deflected by the nucleus in the gold foil experiment. 
C)  some negatively charged beta particles were deflected by the nucleus in the gold foil experiment. 
D)  some positively charged beta particles were deflected by the nucleus in the gold foil experiment. 
A)  some negatively charged alpha particles were deflected by the nucleus in the gold foil experiment. 
B)  some positively charged alpha particles were deflected by the nucleus in the gold foil experiment. 
C)  some negatively charged beta particles were deflected by the nucleus in the gold foil experiment. 
D)  some positively charged beta particles were deflected by the nucleus in the gold foil experiment.

Question 8

The mass of a nucleon is

Accepted Answer

A)  1 gram. 
B)  1 atomic mass unit (u). 
C)  equivalent to the mass of the electron. 
D)  0. 
A)  1 gram. 
B)  1 atomic mass unit (u). 
C)  equivalent to the mass of the electron. 
D)  0.

Question 9

The difference in mass between protons and neutrons is generally regarded as

Accepted Answer

A)  significant. 
B)  insignificant. 
C)  unknown. 
D)  variable. 
A)  significant. 
B)  insignificant. 
C)  unknown. 
D)  variable.

Question 10

Identify the particle that is symbolized by He2+.

Accepted Answer

A)  alpha, α 
B)  beta, β 
C)  gamma, γ 
D)  delta, δ 
A)  alpha, α 
B)  beta, β 
C)  gamma, γ 
D)  delta, δ

Question 11

In which group do all atoms have one valence electron in the ground state?

Accepted Answer

A)  alkali metals 
B)  alkaline earth metals 
C)  halogens 
D)  noble gases 
A)  alkali metals 
B)  alkaline earth metals 
C)  halogens 
D)  noble gases

Question 12

The electrons in the outermost energy level of an atom are called

Accepted Answer

A)  group electrons. 
B)  core electrons. 
C)  valence electrons. 
D)  orbital electrons. 
A)  group electrons. 
B)  core electrons. 
C)  valence electrons. 
D)  orbital electrons.

Question 13

How many electrons are there in a argon atom?

Accepted Answer

A)  36 
B)  18 
C)  40 
D)  24 
A)  36 
B)  18 
C)  40 
D)  24

Question 14

By measuring the deflection of cathode rays in electrical and magnetic fields, J.J. Thomson was able to determine the

Accepted Answer

A)  mass of the electron. 
B)  speed of the electron. 
C)  charge on the electron. 
D)  ratio of mass to charge for the electron. 
A)  mass of the electron. 
B)  speed of the electron. 
C)  charge on the electron. 
D)  ratio of mass to charge for the electron.

Question 15

The sum of protons and neutrons in an atom is called the

Accepted Answer

A)  atomic number. 
B)  atomic mass. 
C)  nuclear mass. 
D)  nucleon number. 
A)  atomic number. 
B)  atomic mass. 
C)  nuclear mass. 
D)  nucleon number.

Question 16

Which element has the same number of valence electrons as boron?

Accepted Answer

A)  Na 
B)  Si 
C)  Ga 
D)  F 
A)  Na 
B)  Si 
C)  Ga 
D)  F

Question 17

Compare and contrast fluorescence and radioactivity.

Accepted Answer

Fluorescence and radioactivity are two d

Question 18

An atom of chlorine-37 has

Accepted Answer

A)  20 protons and 17 neutrons. 
B)  37 neutrons and 17 protons. 
C)  17 protons and 20 neutrons. 
D)  17 neutrons and 37 protons. 
A)  20 protons and 17 neutrons. 
B)  37 neutrons and 17 protons. 
C)  17 protons and 20 neutrons. 
D)  17 neutrons and 37 protons.

Question 19

Electrons occupy most of the volume of an atom.

Accepted Answer

A) True 
 B)False

Question 20

Which element is a noble gas?

Accepted Answer

A)  B 
B)  C 
C)  Xe 
D)  Na 
A)  B 
B)  C 
C)  Xe 
D)  Na

Exam 3: Atomic Structure

Which element is in the same period as neon?

Elements in the same period have

Which type of radioactivity is an electron?

Define electrolysis and the purpose of the anode and the cathode.

The element iron (Fe) occurs naturally as four isotopes. Each of these isotopes has

The isotope P is also called

Rutherford concluded that the nucleus of an atom is positively charged because

The mass of a nucleon is

The difference in mass between protons and neutrons is generally regarded as

Identify the particle that is symbolized by He2+.

In which group do all atoms have one valence electron in the ground state?

The electrons in the outermost energy level of an atom are called

How many electrons are there in a argon atom?

By measuring the deflection of cathode rays in electrical and magnetic fields, J.J. Thomson was able to determine the

The sum of protons and neutrons in an atom is called the

Which element has the same number of valence electrons as boron?

Compare and contrast fluorescence and radioactivity.

An atom of chlorine-37 has

Electrons occupy most of the volume of an atom.

Which element is a noble gas?

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Identify the particle that is symbolized by He²⁺.