Question 1

He has the same number of valence electrons as _____.

Accepted Answer

A)  H 
B)  Ne 
C)  F 
D)  Na 
A)  H 
B)  Ne 
C)  F 
D)  Na

Question 2

Determine the number of atoms in a copper strip that has a mass of 35.0 grams.

Accepted Answer

A)  3.33 × 1025 atoms 
B)  2.11 × 1025 atoms 
C)  2.71 × 1020 atoms 
D)  3.32 × 1023 atoms 
E)  0.551 atoms 
A)  3.33 × 1025 atoms 
B)  2.11 × 1025 atoms 
C)  2.71 × 1020 atoms 
D)  3.32 × 1023 atoms 
E)  0.551 atoms

Question 3

Calculate the number of moles in a 25.0 g sample of carbon.

Accepted Answer

A)  2.08 moles 
B)  13.0 moles 
C)  300 moles 
D)  1.51 × 1025 moles 
E)  3.33 × 10-  3  moles 
A)  2.08 moles 
B)  13.0 moles 
C)  300 moles 
D)  1.51 × 1025 moles 
E)  3.33 × 10-  3  moles

Question 4

Which of these elements is not a transition metal?

Accepted Answer

A)  Cu 
B)  Fe 
C)  Na 
D)  Ag 
E)  Hg 
A)  Cu 
B)  Fe 
C)  Na 
D)  Ag 
E)  Hg

Question 5

An element has two naturally occurring isotopes. One has an abundance of 37.4% and an isotopic mass of 184.953 amu. The other has an abundance of 62.6% and an isotopic mass  of 186.956 amu. What is the atomic weight of the element?

Accepted Answer

A)  185.702 amu 
B)  185.954 amu 
C)  186.207 amu 
D)  186.956 amu 
E)  190.234 amu 
A)  185.702 amu 
B)  185.954 amu 
C)  186.207 amu 
D)  186.956 amu 
E)  190.234 amu

Question 6

Neon has three isotopes. Assuming the mass of each isotope to be very close to its respective mass number, which isotope is the most abundant based on the atomic mass of neon (Ne)?

Accepted Answer

A)  Ne-20 
B)  Ne-21 
C)  Ne-22 
D)  The question lacks sufficient data. 
E)  The abundance of an isotope is independent of the mass number of neon. 
A)  Ne-20 
B)  Ne-21 
C)  Ne-22 
D)  The question lacks sufficient data. 
E)  The abundance of an isotope is independent of the mass number of neon.

Question 7

Which of these elements has seven valence electrons?

Accepted Answer

A)  Mg 
B)  Li 
C)  Al 
D)  S 
E)  Cl 
A)  Mg 
B)  Li 
C)  Al 
D)  S 
E)  Cl

Question 8

Calculate the number of moles of lead in a 442-gram lead anvil.

Accepted Answer

A)  0.468 moles 
B)  2.13 moles 
C)  96.97 moles 
D)  6.022 × 1023 moles 
E)  1.28 × 1024 moles 
A)  0.468 moles 
B)  2.13 moles 
C)  96.97 moles 
D)  6.022 × 1023 moles 
E)  1.28 × 1024 moles

Question 9

What are the Z and A values for an atom of krypton that contains 46 neutrons?

Accepted Answer

A)  Z=36, A=46 
B)  Z=46, A=36 
C)  Z=36, A=82 
D)  Z=82, A=36 
E)  Z=82, A=46 
A)  Z=36, A=46 
B)  Z=46, A=36 
C)  Z=36, A=82 
D)  Z=82, A=36 
E)  Z=82, A=46

Question 10

What is the correct number of atoms in one mole of neon?

Accepted Answer

A)  10 
B)  3.011 x 1023 
C)  6.022 × 1023 
D)  20 
E)  12 
A)  10 
B)  3.011 x 1023 
C)  6.022 × 1023 
D)  20 
E)  12

Question 11

Which of these is the correct chemical symbol for carbon?

Accepted Answer

A)  C 
B)  Ca 
C)  Cl 
D)  Cb 
E)  Co 
A)  C 
B)  Ca 
C)  Cl 
D)  Cb 
E)  Co

Question 12

Determine the correct number of protons and electrons in P  3 −  .

Accepted Answer

A)  3 protons and 6 electrons 
B)  15 protons  and  18 electrons 
C)  15 protons  and  12 electrons 
D)  31 protons  and  28 electrons 
E)  31 protons  and  34 electrons 
A)  3 protons and 6 electrons 
B)  15 protons  and  18 electrons 
C)  15 protons  and  12 electrons 
D)  31 protons  and  28 electrons 
E)  31 protons  and  34 electrons

Question 13

Which scientist is responsible for the organization of the modern periodic table?

Accepted Answer

A)  Bohr 
B)  Galileo 
C)  Dalton 
D)  Avogadro 
E)  Mendeleev 
A)  Bohr 
B)  Galileo 
C)  Dalton 
D)  Avogadro 
E)  Mendeleev

Question 14

The mass of which of the following is the least?

Accepted Answer

A)  A proton 
B)  A neutron 
C)  An electron 
D)  A hydrogen atom 
E)  A hydrogen nucleus 
A)  A proton 
B)  A neutron 
C)  An electron 
D)  A hydrogen atom 
E)  A hydrogen nucleus

Question 15

Determine the mass of one mole of silver.

Accepted Answer

A)  107.87 amu 
B)  107.87 g 
C)  47 amu 
D)  47 g 
E)  6.022 × 1023 amu 
A)  107.87 amu 
B)  107.87 g 
C)  47 amu 
D)  47 g 
E)  6.022 × 1023 amu

Question 16

Which of these is not equivalent to one mole?

Accepted Answer

A)  6.022 × 1023 marbles 
B)  12 grams of carbon 
C)  Avogadro's number 
D)  12 grams of magnesium 
E)  28 grams of nitrogen, N2 
A)  6.022 × 1023 marbles 
B)  12 grams of carbon 
C)  Avogadro's number 
D)  12 grams of magnesium 
E)  28 grams of nitrogen, N2

Question 17

The Ca2+ ion contains _____ protons and _____ electrons.

Accepted Answer

A)  20; 20 
B)  20; 22 
C)  22; 20 
D)  18; 20 
E)  20; 18 
A)  20; 20 
B)  20; 22 
C)  22; 20 
D)  18; 20 
E)  20; 18

Question 18

Radon - 222 has _____ protons, _____ neutrons, and _____ electrons.

Accepted Answer

A)  86; 86; 86 
B)  86; 222; 86 
C)  86; 136; 86 
D)  86; 136; 222 
E)  86; 222; 308 
A)  86; 86; 86 
B)  86; 222; 86 
C)  86; 136; 86 
D)  86; 136; 222 
E)  86; 222; 308

Question 19

Metals tend to _____ electrons to form ions of _____ charge.

Accepted Answer

A)  lose; negative 
B)  lose; positive 
C)  gain; positive 
D)  gain; negative 
E)  gain; neutral 
A)  lose; negative 
B)  lose; positive 
C)  gain; positive 
D)  gain; negative 
E)  gain; neutral

Question 20

Which of these is the correct chemical symbol for cobalt?

Accepted Answer

A)  C 
B)  Cl 
C)  Co 
D)  Ca 
E)  Ce 
A)  C 
B)  Cl 
C)  Co 
D)  Ca 
E)  Ce

He has the same number of valence electrons as _____.

Determine the number of atoms in a copper strip that has a mass of 35.0 grams.

Calculate the number of moles in a 25.0 g sample of carbon.

Which of these elements is not a transition metal?

An element has two naturally occurring isotopes. One has an abundance of 37.4% and an isotopic mass of 184.953 amu. The other has an abundance of 62.6% and an isotopic mass of 186.956 amu. What is the atomic weight of the element?

Neon has three isotopes. Assuming the mass of each isotope to be very close to its respective mass number, which isotope is the most abundant based on the atomic mass of neon (Ne)?

Which of these elements has seven valence electrons?

Calculate the number of moles of lead in a 442-gram lead anvil.

What are the Z and A values for an atom of krypton that contains 46 neutrons?

What is the correct number of atoms in one mole of neon?

Which of these is the correct chemical symbol for carbon?

Determine the correct number of protons and electrons in P ^{3 −} .

Which scientist is responsible for the organization of the modern periodic table?

The mass of which of the following is the least?

Determine the mass of one mole of silver.

Which of these is not equivalent to one mole?

The Ca²⁺ ion contains _ protons and _ electrons.

Radon - 222 has ___ protons, _ neutrons, and ___ electrons.

Metals tend to _ electrons to form ions of _ charge.

Which of these is the correct chemical symbol for cobalt?

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Exam 3: Atoms and Elements

He has the same number of valence electrons as _____.

Determine the number of atoms in a copper strip that has a mass of 35.0 grams.

Calculate the number of moles in a 25.0 g sample of carbon.

Which of these elements is not a transition metal?

An element has two naturally occurring isotopes. One has an abundance of 37.4% and an isotopic mass of 184.953 amu. The other has an abundance of 62.6% and an isotopic mass of 186.956 amu. What is the atomic weight of the element?

Neon has three isotopes. Assuming the mass of each isotope to be very close to its respective mass number, which isotope is the most abundant based on the atomic mass of neon (Ne)?

Which of these elements has seven valence electrons?

Calculate the number of moles of lead in a 442-gram lead anvil.

What are the Z and A values for an atom of krypton that contains 46 neutrons?

What is the correct number of atoms in one mole of neon?

Which of these is the correct chemical symbol for carbon?

Determine the correct number of protons and electrons in P 3 − .

Which scientist is responsible for the organization of the modern periodic table?

The mass of which of the following is the least?

Determine the mass of one mole of silver.

Which of these is not equivalent to one mole?

The Ca2+ ion contains _____ protons and _____ electrons.

Radon - 222 has _____ protons, _____ neutrons, and _____ electrons.

Metals tend to _____ electrons to form ions of _____ charge.

Which of these is the correct chemical symbol for cobalt?

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

Nanotechnology Online Only

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Determine the correct number of protons and electrons in P ^{3 −} .

The Ca²⁺ ion contains _ protons and _ electrons.

Radon - 222 has ___ protons, _ neutrons, and ___ electrons.

Metals tend to _ electrons to form ions of _ charge.