Question 1

Which of the halogens is a solid at room temperature?

Accepted Answer

A) fluorine 
B) chlorine 
C) bromine 
D) iodine 
A) fluorine 
B) chlorine 
C) bromine 
D) iodine

Question 2

Which contains 14 neutrons?

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)

Question 3

Which element is a halogen?

Accepted Answer

A) Ba 
B) Li 
C) Xe 
D) F 
A) Ba 
B) Li 
C) Xe 
D) F

Question 4

Elements at the bottom of Group 7A on the periodic table are much more reactive than elements at the top of the group.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following elements will react most vigorously with sodium?

Accepted Answer

A) bromine 
B) chlorine 
C) fluorine 
D) iodine 
A) bromine 
B) chlorine 
C) fluorine 
D) iodine

Question 6

Which radioactive particle was used by Geiger and Marsden in their experiments with thin metal foils?

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 7

A metalloid

Accepted Answer

A) is the same as a metal. 
B) is located on the left side of the periodic table. 
C) has properties intermediate between metals and nonmetals. 
D) is in the center of the periodic table. 
A) is the same as a metal. 
B) is located on the left side of the periodic table. 
C) has properties intermediate between metals and nonmetals. 
D) is in the center of the periodic table.

Question 8

Which type of radioactivity has essentially no mass?

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 9

Describe a cathode ray tube and its significance in determining the subatomic structure of atoms.

Accepted Answer

A cathode ray tube is a vacuum tube that

Question 10

The positive particles had varying masses in Goldstein's experiments using a gas discharge tube with perforated cathodes.

Accepted Answer

A) True 
 B)False

Question 11

The number of protons in a Br atom is

Accepted Answer

A) 35. 
B) 80. 
C) 79. 
D) 81. 
A) 35. 
B) 80. 
C) 79. 
D) 81.

Question 12

Which is a correct description of the organization of subatomic particles in atoms?

Accepted Answer

A) Protons and electrons are tightly packed into a small nucleus.Neutrons occupy the space outside the nucleus. 
B) Protons and neutrons are tightly packed into a small nucleus.Electrons occupy the space outside the nucleus. 
C) Neutrons and electrons are tightly packed into a small nucleus.Protons occupy the space outside of the nucleus. 
D) Electrons are tightly packed into a small nucleus.Protons and neutrons occupy the space outside of the nucleus. 
A) Protons and electrons are tightly packed into a small nucleus.Neutrons occupy the space outside the nucleus. 
B) Protons and neutrons are tightly packed into a small nucleus.Electrons occupy the space outside the nucleus. 
C) Neutrons and electrons are tightly packed into a small nucleus.Protons occupy the space outside of the nucleus. 
D) Electrons are tightly packed into a small nucleus.Protons and neutrons occupy the space outside of the nucleus.

Question 13

Cathode rays are beams of

Accepted Answer

A) anions. 
B) electrons. 
C) neutrons. 
D) protons. 
A) anions. 
B) electrons. 
C) neutrons. 
D) protons.

Question 14

The experiment that confirmed the existence of neutrons was performed

Accepted Answer

A) before the discovery of the proton. 
B) at about the same time as the discovery of the proton. 
C) after the discovery of the proton. 
D) with the discovery of the first element. 
A) before the discovery of the proton. 
B) at about the same time as the discovery of the proton. 
C) after the discovery of the proton. 
D) with the discovery of the first element.

Question 15

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

Accepted Answer

A) Na 
B) Ba 
C) Ga 
D) As 
A) Na 
B) Ba 
C) Ga 
D) As

Question 16

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 17

Based upon the experiments of his co-workers,Rutherford proposed that

Accepted Answer

A) atoms are mostly empty space. 
B) most of the mass of atoms is located in a dense, small volume nucleus. 
C) the nucleus is positively charged. 
D) all of the above 
A) atoms are mostly empty space. 
B) most of the mass of atoms is located in a dense, small volume nucleus. 
C) the nucleus is positively charged. 
D) all of the above

Question 18

All noble gases have ________ valence electrons.

Accepted Answer

A) three 
B) five 
C) seven 
D) eight 
A) three 
B) five 
C) seven 
D) eight

Question 19

An atom represented by   has

Accepted Answer

A) 20 protons and 26 neutrons. 
B) 20 neutrons and 26 protons. 
C) 20 protons and 46 neutrons. 
D) 20 neutrons and 46 protons. 
A) 20 protons and 26 neutrons. 
B) 20 neutrons and 26 protons. 
C) 20 protons and 46 neutrons. 
D) 20 neutrons and 46 protons.

Question 20

Compare and contrast fluorescence and radioactivity.

Accepted Answer

Fluorescence and radioactivity are two d

Exam 3: Atomic Structure

Which of the halogens is a solid at room temperature?

Which contains 14 neutrons?

Which element is a halogen?

Elements at the bottom of Group 7A on the periodic table are much more reactive than elements at the top of the group.

Which of the following elements will react most vigorously with sodium?

Which radioactive particle was used by Geiger and Marsden in their experiments with thin metal foils?

A metalloid

Which type of radioactivity has essentially no mass?

Describe a cathode ray tube and its significance in determining the subatomic structure of atoms.

The positive particles had varying masses in Goldstein's experiments using a gas discharge tube with perforated cathodes.

The number of protons in a Br atom is

Which is a correct description of the organization of subatomic particles in atoms?

Cathode rays are beams of

The experiment that confirmed the existence of neutrons was performed

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

An atom of chlorine-37 has

Based upon the experiments of his co-workers,Rutherford proposed that

All noble gases have ________ valence electrons.

An atom represented by has

Compare and contrast fluorescence and radioactivity.

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