Question 1

The elements of group IA will all form ions. These ions will be _____ and will have a charge of _____.

Accepted Answer

A) cations, 2+ 
B) anions, 2 − 
C) cations, 3+ 
D) anions, 1 − 
E) cations, 1+ 
A) cations, 2+ 
B) anions, 2 − 
C) cations, 3+ 
D) anions, 1 − 
E) cations, 1+

Question 2

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

Question 3

What is the total number of electrons which 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 4

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 5

Which scientist is credited with developing the mole concept?

Accepted Answer

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

Question 6

One mole of nickel (Ni)has a mass of _____.

Accepted Answer

A) 28 amu 
B) 28 g 
C) 58.71 amu 
D) 58.71 g 
A) 28 amu 
B) 28 g 
C) 58.71 amu 
D) 58.71 g

Question 7

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

Accepted Answer

A) Ne-20 
B) Ne-21 
C) Ne-22 
D) Can't tell from the given information. 
A) Ne-20 
B) Ne-21 
C) Ne-22 
D) Can't tell from the given information.

Question 8

Which of the following elements is generally not found in diatomic form in nature?

Accepted Answer

A) C 
B) N 
C) O 
D) F 
A) C 
B) N 
C) O 
D) F

Question 9

Rubidium consists of two naturally occurring isotopes rubidium-85 and rubidium-87. Rubidium-85 (85Rb)has an isotopic mass of 84.9117 amu and a 72.15% abundance. Rubidium-87(87Rb)has a 27.85% abundance. The atomic weight of rubidium is 85.4768 amu. Determine the isotopic mass of 87Rb?

Accepted Answer

A) 86.72371 amu 
B) 86.8013 amu 
C) 86.8220 amu 
D) 86.8621 amu 
E) 86.9085 amu 
A) 86.72371 amu 
B) 86.8013 amu 
C) 86.8220 amu 
D) 86.8621 amu 
E) 86.9085 amu

Question 10

Which of these elements is a metal?

Accepted Answer

A) Mg 
B) Br 
C) Ar 
D) Ge 
E) B 
A) Mg 
B) Br 
C) Ar 
D) Ge 
E) B

Question 11

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 12

Which of these elements has two 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 13

Which of these statements best describes the formation of a cation?

Accepted Answer

A) An atom loses one or more electrons and becomes positively charged. 
B) An atom loses one or more electrons and becomes negatively charged. 
C) An atom gains one or more electrons and becomes positively charged. 
D) An atom gains one or more electrons and becomes negatively charged. 
E) None of these are correct. 
A) An atom loses one or more electrons and becomes positively charged. 
B) An atom loses one or more electrons and becomes negatively charged. 
C) An atom gains one or more electrons and becomes positively charged. 
D) An atom gains one or more electrons and becomes negatively charged. 
E) None of these are correct.

Question 14

Which of these particles has the smallest mass?

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 correct number of protons and electrons in P3 −  .

Accepted Answer

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

Question 16

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 17

The elements of group 7A will all form ions. These ions will be _____ and will have a charge of _____.

Accepted Answer

A) cations, 2+ 
B) anions, 2 − 
C) cations, 3+ 
D) anions, 1 − 
E) cations, 1+ 
A) cations, 2+ 
B) anions, 2 − 
C) cations, 3+ 
D) anions, 1 − 
E) cations, 1+

Question 18

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 19

Determine the mass in grams of 1.15 × 1023 atoms of cobalt.

Accepted Answer

A) 0.191 grams 
B) 5.23 grams 
C) 11.2 grams 
D) 12.4 grams 
E) 308 grams 
A) 0.191 grams 
B) 5.23 grams 
C) 11.2 grams 
D) 12.4 grams 
E) 308 grams

Question 20

Which of these statements best describes the formation of an anion?

Accepted Answer

A) An atom loses one or more electrons and becomes positively charged. 
B) An atom loses one or more electrons and becomes negatively charged. 
C) An atom gains one or more electrons and becomes positively charged. 
D) An atom gains one or more electrons and becomes negatively charged. 
E) None of these are correct. 
A) An atom loses one or more electrons and becomes positively charged. 
B) An atom loses one or more electrons and becomes negatively charged. 
C) An atom gains one or more electrons and becomes positively charged. 
D) An atom gains one or more electrons and becomes negatively charged. 
E) None of these are correct.

The elements of group IA will all form ions. These ions will be _ and will have a charge of _.

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

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

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

Which scientist is credited with developing the mole concept?

One mole of nickel (Ni)has a mass of _____.

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

Which of the following elements is generally not found in diatomic form in nature?

Rubidium consists of two naturally occurring isotopes rubidium-85 and rubidium-87. Rubidium-85 (⁸⁵Rb)has an isotopic mass of 84.9117 amu and a 72.15% abundance. Rubidium-87(⁸⁷Rb)has a 27.85% abundance. The atomic weight of rubidium is 85.4768 amu. Determine the isotopic mass of ⁸⁷Rb?

Which of these elements is a metal?

Which of these is not equivalent to one mole?

Which of these elements has two valence electrons?

Which of these statements best describes the formation of a cation?

Which of these particles has the smallest mass?

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

The Ca²⁺ ion contains _ protons and _ electrons.

The elements of group 7A will all form ions. These ions will be _ and will have a charge of _.

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

Determine the mass in grams of 1.15 × 10²³ atoms of cobalt.

Which of these statements best describes the formation of an anion?

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Exam 3: Atoms and Elements

The elements of group IA will all form ions. These ions will be _____ and will have a charge of _____.

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

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

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

Which scientist is credited with developing the mole concept?

One mole of nickel (Ni)has a mass of _____.

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

Which of the following elements is generally not found in diatomic form in nature?

Rubidium consists of two naturally occurring isotopes rubidium-85 and rubidium-87. Rubidium-85 (85Rb)has an isotopic mass of 84.9117 amu and a 72.15% abundance. Rubidium-87(87Rb)has a 27.85% abundance. The atomic weight of rubidium is 85.4768 amu. Determine the isotopic mass of 87Rb?

Which of these elements is a metal?

Which of these is not equivalent to one mole?

Which of these elements has two valence electrons?

Which of these statements best describes the formation of a cation?

Which of these particles has the smallest mass?

Determine the correct number of protons and electrons in P3 − .

The Ca2+ ion contains _____ protons and _____ electrons.

The elements of group 7A will all form ions. These ions will be _____ and will have a charge of _____.

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

Determine the mass in grams of 1.15 × 1023 atoms of cobalt.

Which of these statements best describes the formation of an anion?

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

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The elements of group IA will all form ions. These ions will be _ and will have a charge of _.

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

Rubidium consists of two naturally occurring isotopes rubidium-85 and rubidium-87. Rubidium-85 (⁸⁵Rb)has an isotopic mass of 84.9117 amu and a 72.15% abundance. Rubidium-87(⁸⁷Rb)has a 27.85% abundance. The atomic weight of rubidium is 85.4768 amu. Determine the isotopic mass of ⁸⁷Rb?

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

The Ca²⁺ ion contains _ protons and _ electrons.

The elements of group 7A will all form ions. These ions will be _ and will have a charge of _.

Determine the mass in grams of 1.15 × 10²³ atoms of cobalt.