Question 1

Which of the following elements is not a nonmetal?

Accepted Answer

A)  P 
B)  I 
C)  N 
D)  K 
E)  Cl 
A)  P 
B)  I 
C)  N 
D)  K 
E)  Cl

Question 2

Chlorine has two isotopes, 35Cl and 37Cl, whose respective abundances are 75.77% and 24.23% and masses are 34.9688 amu and 36.9659 amu. Calculate the atomic mass of chlorine.

Accepted Answer

A)  37.54 amu 
B)  36.65 amu 
C)  35.45 amu 
D)  34.97 amu 
E)  36.97 amu 
A)  37.54 amu 
B)  36.65 amu 
C)  35.45 amu 
D)  34.97 amu 
E)  36.97 amu

Question 3

Which of the following is true?

Accepted Answer

A)  Argon and chlorine have the same number of electrons. 
B)  Argon and chlorine have the same number of valence electrons. 
C)  Argon and neon have the same number of electrons. 
D)  Argon and neon have the same number of valence electrons. 
E)  Argon and helium have the same number of electrons. 
A)  Argon and chlorine have the same number of electrons. 
B)  Argon and chlorine have the same number of valence electrons. 
C)  Argon and neon have the same number of electrons. 
D)  Argon and neon have the same number of valence electrons. 
E)  Argon and helium have the same number of electrons.

Question 4

The most abundant element in the Earth's crust by mass is _____.

Accepted Answer

A)  hydrogen 
B)  carbon 
C)  oxygen 
D)  silicon 
E)  nitrogen 
A)  hydrogen 
B)  carbon 
C)  oxygen 
D)  silicon 
E)  nitrogen

Question 5

Determine the mass in grams of one molecule of water, H2O.

Accepted Answer

A)  2.99 × 10 − 23 g 
B)  1.08 × 1025 g 
C)  10 grams 
D)  18 grams 
E)  None of these. 
A)  2.99 × 10 − 23 g 
B)  1.08 × 1025 g 
C)  10 grams 
D)  18 grams 
E)  None of these.

Question 6

How many atoms does one mole of aluminum contain?

Accepted Answer

A)  12 
B)  26.98 
C)  6.022 × 1023 
D)  12.044 x 1023 
E)  14 
A)  12 
B)  26.98 
C)  6.022 × 1023 
D)  12.044 x 1023 
E)  14

Question 7

The atomic number is abbreviated as _____.

Accepted Answer

A)  A 
B)  N 
C)  E 
D)  P 
E)  Z 
A)  A 
B)  N 
C)  E 
D)  P 
E)  Z

Question 8

The atomic mass of fluorine (F) is 19.00. Which of the following is not true?

Accepted Answer

A)  An atom of F has a mass of 19.00 amu. 
B)  One mole of F has a mass of 19.00 g. 
C)  The mass of 6.02 x 1023 atoms of F is 19.00 g. 
D)  The mass of 6.02 x 10  23  atoms of F is 19.00 amu. 
E)  The approximate total number of protons and neutrons in fluorine is 19. 
A)  An atom of F has a mass of 19.00 amu. 
B)  One mole of F has a mass of 19.00 g. 
C)  The mass of 6.02 x 1023 atoms of F is 19.00 g. 
D)  The mass of 6.02 x 10  23  atoms of F is 19.00 amu. 
E)  The approximate total number of protons and neutrons in fluorine is 19.

Question 9

Carbon has three isotopes:  12  C,  13  C, and  14  C. If the atomic number of carbon is 6, t hese  isotopes each have _____, _____, and _____ neutrons, respectively.

Accepted Answer

A)  6; 7; 8 
B)  6; 7; 8.0 
C)  12; 13; 14 
D)  12.0; 13; 14 
E)  24; 25; 26 
A)  6; 7; 8 
B)  6; 7; 8.0 
C)  12; 13; 14 
D)  12.0; 13; 14 
E)  24; 25; 26

Question 10

What is the maximum number of electrons that can occupy the orbit n =2?

Accepted Answer

A)  2 
B)  6 
C)  8 
D)  10 
E)  18 
A)  2 
B)  6 
C)  8 
D)  10 
E)  18

Question 11

Calculate the number of moles in a 2.98 g sample of aluminum.

Accepted Answer

A)  0.0124 moles 
B)  0.110 moles 
C)  80.4 moles 
D)  1.79 × 1024 moles 
E)  1.62 × 1025 moles 
A)  0.0124 moles 
B)  0.110 moles 
C)  80.4 moles 
D)  1.79 × 1024 moles 
E)  1.62 × 1025 moles

Question 12

Bromine is a member of which group/family?

Accepted Answer

A)  Halogens 
B)  Noble gases 
C)  Alkali metals 
D)  Transition metals 
E)  Alkaline earth metals 
A)  Halogens 
B)  Noble gases 
C)  Alkali metals 
D)  Transition metals 
E)  Alkaline earth metals

Question 13

How many electrons are there in  15  N  3 −  ?

Accepted Answer

A)  15 
B)  18 
C)  12 
D)  4 
E)  10 
A)  15 
B)  18 
C)  12 
D)  4 
E)  10

Question 14

The Cl  −  ion contains _____ protons and _____ electrons.

Accepted Answer

A)  17; 17 
B)  17; 18 
C)  18; 16 
D)  18; 18 
E)  16; 17 
A)  17; 17 
B)  17; 18 
C)  18; 16 
D)  18; 18 
E)  16; 17

Question 15

Determine the mass in grams of 3.45 × 1025 molecules of oxygen, O2.

Accepted Answer

A)  0.556 grams 
B)  57.2 grams 
C)  458 grams 
D)  916 grams 
E)  1.83 × 103 grams 
A)  0.556 grams 
B)  57.2 grams 
C)  458 grams 
D)  916 grams 
E)  1.83 × 103 grams

Question 16

What is the total number of electrons that can occupy the first and second principal energy levels ( n =1, n =2)?

Accepted Answer

A)  2 
B)  6 
C)  8 
D)  10 
E)  18 
A)  2 
B)  6 
C)  8 
D)  10 
E)  18

Question 17

The elements Li, Na, K, Rb, and Cs are the members of which group/family?

Accepted Answer

A)  Halogens 
B)  Noble gases 
C)  Alkali metals 
D)  Transition metals 
E)  Alkaline earth metals 
A)  Halogens 
B)  Noble gases 
C)  Alkali metals 
D)  Transition metals 
E)  Alkaline earth metals

Question 18

Which of these is the correct chemical symbol for potassium?

Accepted Answer

A)  K 
B)  Po 
C)  P 
D)  Pd 
E)  Pt 
A)  K 
B)  Po 
C)  P 
D)  Pd 
E)  Pt

Question 19

Calculate the number of moles in a 233-gram sample of barium.

Accepted Answer

A)  0.589 moles 
B)  1.70 moles 
C)  3.20 × 104 
D)  6.022 × 1023 moles 
E)  1.02 × 1024 moles 
A)  0.589 moles 
B)  1.70 moles 
C)  3.20 × 104 
D)  6.022 × 1023 moles 
E)  1.02 × 1024 moles

Question 20

Which of these groups is incorrectly matched with its group/family name?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Which of the following elements is not a nonmetal?

Chlorine has two isotopes, 35Cl and 37Cl, whose respective abundances are 75.77% and 24.23% and masses are 34.9688 amu and 36.9659 amu. Calculate the atomic mass of chlorine.

Which of the following is true?

The most abundant element in the Earth's crust by mass is _____.

Determine the mass in grams of one molecule of water, H₂O.

How many atoms does one mole of aluminum contain?

The atomic number is abbreviated as _____.

The atomic mass of fluorine (F) is 19.00. Which of the following is not true?

Carbon has three isotopes: ¹² C, ¹³ C, and ¹⁴ C. If the atomic number of carbon is 6, t hese isotopes each have ___, _, and ___ neutrons, respectively.

What is the maximum number of electrons that can occupy the orbit n =2?

Calculate the number of moles in a 2.98 g sample of aluminum.

Bromine is a member of which group/family?

How many electrons are there in ¹⁵ N ^{3 −} ?

The Cl ⁻ ion contains _ protons and _ electrons.

Determine the mass in grams of 3.45 × 10²⁵ molecules of oxygen, O_2.

What is the total number of electrons that can occupy the first and second principal energy levels ( n =1, n =2)?

The elements Li, Na, K, Rb, and Cs are the members of which group/family?

Which of these is the correct chemical symbol for potassium?

Calculate the number of moles in a 233-gram sample of barium.

Which of these groups is incorrectly matched with its group/family name?

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Exam 3: Atoms and Elements

Which of the following elements is not a nonmetal?

Chlorine has two isotopes, 35Cl and 37Cl, whose respective abundances are 75.77% and 24.23% and masses are 34.9688 amu and 36.9659 amu. Calculate the atomic mass of chlorine.

Which of the following is true?

The most abundant element in the Earth's crust by mass is _____.

Determine the mass in grams of one molecule of water, H2O.

How many atoms does one mole of aluminum contain?

The atomic number is abbreviated as _____.

The atomic mass of fluorine (F) is 19.00. Which of the following is not true?

Carbon has three isotopes: 12 C, 13 C, and 14 C. If the atomic number of carbon is 6, t hese isotopes each have _____, _____, and _____ neutrons, respectively.

What is the maximum number of electrons that can occupy the orbit n =2?

Calculate the number of moles in a 2.98 g sample of aluminum.

Bromine is a member of which group/family?

How many electrons are there in 15 N 3 − ?

The Cl − ion contains _____ protons and _____ electrons.

Determine the mass in grams of 3.45 × 1025 molecules of oxygen, O2.

What is the total number of electrons that can occupy the first and second principal energy levels ( n =1, n =2)?

The elements Li, Na, K, Rb, and Cs are the members of which group/family?

Which of these is the correct chemical symbol for potassium?

Calculate the number of moles in a 233-gram sample of barium.

Which of these groups is incorrectly matched with its group/family name?

Molecular Reasons

The Chemists Toolbox

Molecules, Compounds, and Chemical Reactions

Chemical Bonding

Organic Chemistry

Light and Color

Nuclear Chemistry

Energy for Today

Energy for Tomorrow: Solar and Other Renewable Energy Sources

The Air Around Us

The Liquids and Solids Around Us: Especially Water

Acids and Bases: the Molecules Responsible for Sour and Bitter

Oxidation and Reduction

The Chemistry of Household Products

Biochemistry and Biotechnology

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

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Determine the mass in grams of one molecule of water, H₂O.

Carbon has three isotopes: ¹² C, ¹³ C, and ¹⁴ C. If the atomic number of carbon is 6, t hese isotopes each have ___, _, and ___ neutrons, respectively.

How many electrons are there in ¹⁵ N ^{3 −} ?

The Cl ⁻ ion contains _ protons and _ electrons.

Determine the mass in grams of 3.45 × 10²⁵ molecules of oxygen, O_2.