Question 1

A fictional element named Nivadium is found to have three naturally occurring isotopes with the natural abundances shown here: 
The calculated atomic mass of Nivadium is:

Accepted Answer

A)  7.61 amu
B)  22.83 amu
C)  23.18 amu
D)  69.55 amu
E)  none of the above

Question 2

The mass of a proton is exactly the same as the mass of a neutron.

Accepted Answer

A) True 
 B)False

Question 3

The gold foil experiment proved that large regions of the atoms consisted of empty space.

Accepted Answer

A) True 
 B)False

Question 4

Which statement reflects the results of Rutherford's gold foil experiments?

Accepted Answer

A)  Almost all of the alpha particles were deflected back in the direction from which they came.
B)  Almost all of the alpha particles sputtered gold atoms off of the surface of the foil.
C)  Almost all of the alpha particles were deflected while passing through the foil.
D)  Almost all of the alpha particles passed directly through the foil.
E)  none of the above

Question 5

The charges on electrons and neutrons cancel each other to give neutral atoms.

Accepted Answer

A) True 
 B)False

Question 6

Protons and electrons each have a mass of 1 amu.

Accepted Answer

A) True 
 B)False

Question 7

Group 8A elements are also called:

Accepted Answer

A)  noble gases.
B)  halogens.
C)  alkaline earth metals.
D)  alkali metals.
E)  none of the above

Question 8

An atom of a carbon-14 isotope would contain:

Accepted Answer

A)  6 protons,8 neutrons,and 6 electrons.
B)  8 protons,6 neutrons,and 8 electrons.
C)  6 protons,8 neutrons,and 8 electrons.
D)  14 protons,6 neutrons,and 6 electrons.
E)  20 protons,6 neutrons,and 20 electrons.

Question 9

All of the following statements about different elements are true EXCEPT:

Accepted Answer

A)  Barium is an alkaline earth metal.
B)  Manganese is a transition metal.
C)  Sulfur is considered a metalloid.
D)  Krypton is one of the noble gases.
E)  Iodine is a halogen.

Question 10

All elemental symbols are comprised of a two-letter abbreviation.

Accepted Answer

A) True 
 B)False

Question 11

Group 2A elements are also called:

Accepted Answer

A)  noble gases.
B)  halogens.
C)  alkaline earth metals.
D)  alkali metals.
E)  none of the above

Question 12

Which statement below is NOT consistent with the nuclear theory of the atom as proposed by Rutherford?

Accepted Answer

A)  Most of the atom's mass and all of its positive charge is contained in a small core called the nucleus.
B)  Electrical charge is a fundamental property of protons and electrons in which like charges repel and opposite charges attract.
C)  Most of the volume of the atom is empty space occupied by tiny,negatively charged electrons.
D)  There are as many electrons outside the nucleus as there are protons inside the nucleus in a neutral atom.
E)  All of the above statements are consistent.

Question 13

An element is discovered that is a solid,has one valence electron,and readily forms a 1+ ion.This element would be correctly classified as a nonmetal.

Accepted Answer

A) True 
 B)False

Question 14

In the modern periodic table,elements are listed in order of increasing atomic number rather than increasing relative mass.

Accepted Answer

A) True 
 B)False

Question 15

The atom is the fundamental building block of everything we hear,feel,see,and experience.

Accepted Answer

A) True 
 B)False

Question 16

What is the mass number of the hydrogen isotope that contains 2 neutrons?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  none of the above

Question 17

If an isotope of an element has 27 neutrons and a mass number of 52,how many electrons must it have?

Accepted Answer

A)  25
B)  27
C)  52
D)  79
E)  none of the above

Question 18

Xe is a member of which family?

Accepted Answer

A)  noble gases
B)  halogens
C)  alkaline earth metals
D)  alkali metals
E)  none of the above

Question 19

Which of the following subatomic particles has a mass of 1.67 × 10-27 kg?

Accepted Answer

A)  electrons only
B)  protons only
C)  neutrons only
D)  protons and neutrons
E)  none of the above

Question 20

Main-group elements tend to form ions that have the same number of total electrons as the nearest halogen.

Accepted Answer

A) True 
 B)False

Exam 4: Atoms and Elements

Xe is a member of which family?

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Protons and electrons each have a mass of 1 amu.

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Group 2A elements are also called:

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A fictional element named Nivadium is found to have three naturally occurring isotopes with the natural abundances shown here: The calculated atomic mass of Nivadium is:

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What is the mass number of the hydrogen isotope that contains 2 neutrons?

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All of the following statements about different elements are true EXCEPT:

Correct AnswerverifiedShow Answer

Which of the following subatomic particles has a mass of 1.67 × 10-27 kg?

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If an isotope of an element has 27 neutrons and a mass number of 52,how many electrons must it have?

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All elemental symbols are comprised of a two-letter abbreviation.

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Which statement reflects the results of Rutherford's gold foil experiments?

Correct AnswerverifiedShow Answer

In the modern periodic table,elements are listed in order of increasing atomic number rather than increasing relative mass.

Correct AnswerverifiedShow Answer

The gold foil experiment proved that large regions of the atoms consisted of empty space.

Correct AnswerverifiedShow Answer

An element is discovered that is a solid,has one valence electron,and readily forms a 1+ ion.This element would be correctly classified as a nonmetal.

Correct AnswerverifiedShow Answer

The charges on electrons and neutrons cancel each other to give neutral atoms.

Correct AnswerverifiedShow Answer

An atom of a carbon-14 isotope would contain:

Correct AnswerverifiedShow Answer

The atom is the fundamental building block of everything we hear,feel,see,and experience.

Correct AnswerverifiedShow Answer

Which statement below is NOT consistent with the nuclear theory of the atom as proposed by Rutherford?

Correct AnswerverifiedShow Answer

Main-group elements tend to form ions that have the same number of total electrons as the nearest halogen.

Correct AnswerverifiedShow Answer

The mass of a proton is exactly the same as the mass of a neutron.

Correct AnswerverifiedShow Answer

Group 8A elements are also called:

Correct AnswerverifiedShow Answer

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Which of the following subatomic particles has a mass of 1.67 × 10^-27 kg?

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