Question 1

What is the correct chemical symbol for mercury?

Accepted Answer

A)  Hm
B)  Hy
C)  Me
D)  My
E)  none of the above

Question 2

An atom that has the same number of neutrons as 
Ba is:

Accepted Answer

A)   Cs
B)   Ba
C)   La
D)   Xe
E)  none of the above

Question 3

Which of the following elements has only 12 protons?

Accepted Answer

A)  C
B)  Zn
C)  Mg
D)  O
E)  none of the above

Question 4

A positive charge attracts negative charges and repels other positive charges.

Accepted Answer

A) True 
 B)False

Question 5

J.J.Thomson discovered the existence of protons.

Accepted Answer

A) True 
 B)False

Question 6

Given that the molecular mass of bromine is 79.90 grams,which of the following isotopes would you expect to have the greatest natural abundance?

Accepted Answer

A)  Br-79
B)  Br-80
C)  Br-81
D)  Br-82
E)  none of the above

Question 7

An atom is the smallest identifiable unit of a compound.

Accepted Answer

A) True 
 B)False

Question 8

The names of the elements whose symbols are Si,P,Mn,and S are respectively:

Accepted Answer

A)  silicon,potassium,magnesium,and sulfur.
B)  silver,phosphorus,magnesium,and sulfur.
C)  silicon,phosphorus,manganese,and sulfur.
D)  silicon,phosphorus,magnesium,and sulfur.
E)  silicon,potassium,magnesium,and sodium.

Question 9

Which of the following statements about the nature of electrical charge is FALSE?

Accepted Answer

A)  Electrical charge is a fundamental property of protons and electrons.
B)  Positive and negative electrical charges attract each other.
C)  Positive-positive or negative-negative charges repel each other.
D)  Positive and negative charges cancel each other so that a proton and electron,when paired,are charge neutral.
E)  All of the above statements are true.

Question 10

Which of the following is NOT a correct name,symbol combination?

Accepted Answer

A)  beryllium,Be
B)  magnesium,Mg
C)  iron,I
D)  manganese,Mn
E)  silicon,Si

Question 11

What is the charge on the cesium ion?

Accepted Answer

A)  1-
B)  2-
C)  1+
D)  2+
E)  none of the above

Question 12

Ernest Rutherford proved the existence of electrons.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following statements about atoms is FALSE?

Accepted Answer

A)  Atoms compose all matter.
B)  Atoms are responsible for the sensation of smell.
C)  Atoms are the basic building block of nature.
D)  An atom is the smallest identifiable unit of an element.
E)  All of the above statements are true.

Question 14

Cr 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 15

The number of protons in the nucleus of an atom:

Accepted Answer

A)  is called the atomic number.
B)  is given the symbol "Z."
C)  identifies the atom as a particular element.
D)  is the same for all isotopes of an element.
E)  all of the above

Question 16

Which of the following statements about ions is INCORRECT?

Accepted Answer

A)  Cations are positive ions and anions are negative ions.
B)  Cations are formed when an atom loses electrons.
C)  Anions are formed when an atom gains electrons.
D)  Cations always have the same number of protons as electrons.
E)  All statements are correct.

Question 17

What is the charge on the ion formed by selenium?

Accepted Answer

A)  1-
B)  2-
C)  1+
D)  2+
E)  none of the above

Question 18

Group 7A elements are also called:

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 elements has an atomic number of 4?

Accepted Answer

A)  H
B)  C
C)  He
D)  Be
E)  none of the above

Question 20

All elements have three or more naturally occurring isotopes.

Accepted Answer

A) True 
 B)False

Exam 4: Atoms and Elements

J.J.Thomson discovered the existence of protons.

Correct AnswerverifiedShow Answer

An atom that has the same number of neutrons as Ba is:

Correct AnswerverifiedShow Answer

Cr is a member of which family?

Correct AnswerverifiedShow Answer

What is the charge on the ion formed by selenium?

Correct AnswerverifiedShow Answer

A positive charge attracts negative charges and repels other positive charges.

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All elements have three or more naturally occurring isotopes.

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Which of the following statements about ions is INCORRECT?

Correct AnswerverifiedShow Answer

What is the correct chemical symbol for mercury?

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Which of the following elements has an atomic number of 4?

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Which of the following statements about atoms is FALSE?

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The names of the elements whose symbols are Si,P,Mn,and S are respectively:

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Which of the following elements has only 12 protons?

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The number of protons in the nucleus of an atom:

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What is the charge on the cesium ion?

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Which of the following is NOT a correct name,symbol combination?

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Which of the following statements about the nature of electrical charge is FALSE?

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Group 7A elements are also called:

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Ernest Rutherford proved the existence of electrons.

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An atom is the smallest identifiable unit of a compound.

Correct AnswerverifiedShow Answer

Given that the molecular mass of bromine is 79.90 grams,which of the following isotopes would you expect to have the greatest natural abundance?

Correct AnswerverifiedShow Answer

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