Question 1

Which of the following elements is a nonmetal?

Accepted Answer

A) Zn 
B) Cs 
C) Ca 
D) Co 
E) P 
A) Zn 
B) Cs 
C) Ca 
D) Co 
E) P E

Question 2

The atomic mass of tungsten is 183.84 u.Given the following information for the mass and abundance of the other common isotopes,calculate the atomic mass of tungsten-186. 
W-180$\quad$ 179.9467u $\quad$ 0.12%
W-182$\quad$ 181.9482u $\quad$ 26.50%
W-183$\quad$ 182.9502u $\quad$ 14.31%
W-184$\quad$ 183.9509u $\quad$ 30.64%
W-186 $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$28.43%

Accepted Answer

A) 185.75 u 
B) 186.48 u 
C) 186.98 u 
D) 184.41 u 
E) 185.95 u 
A) 185.75 u 
B) 186.48 u 
C) 186.98 u 
D) 184.41 u 
E) 185.95 u E

Question 3

How many molecules are in 2.50 moles of CO2?

Accepted Answer

A) 4.52 × 1024 molecules 
B) 1.51 × 1024 molecules 
C) 5.02 × 1023 molecules 
D) 3.01 × 1024 molecules 
E) 7.53 × 1023 molecules 
A) 4.52 × 1024 molecules 
B) 1.51 × 1024 molecules 
C) 5.02 × 1023 molecules 
D) 3.01 × 1024 molecules 
E) 7.53 × 1023 molecules B

Question 4

Identify a cation.

Accepted Answer

A) An atom that has lost (an)electron(s). 
B) An atom that has gained (an)electron(s). 
C) An atom that has lost (a)proton(s). 
D) An atom that has gained (a)proton(s). 
A) An atom that has lost (an)electron(s). 
B) An atom that has gained (an)electron(s). 
C) An atom that has lost (a)proton(s). 
D) An atom that has gained (a)proton(s).

Question 5

The atomic number is equal to the number of ________.

Accepted Answer

The answer of The atomic number is equal to the...

Question 6

Which of the following elements has chemical properties similar to tellurium?

Accepted Answer

A) fluorine 
B) hydrogen 
C) nitrogen 
D) sulfur 
A) fluorine 
B) hydrogen 
C) nitrogen 
D) sulfur

Question 7

Predict the charge that a calcium ion would have.

Accepted Answer

A) 6- 
B) 2- 
C) 3+ 
D) 2+ 
E) 1+ 
A) 6- 
B) 2- 
C) 3+ 
D) 2+ 
E) 1+

Question 8

Identify the symbol for fluorine.

Accepted Answer

A) F 
B) Fl 
C) Fo 
D) Fu 
E) Fr 
A) F 
B) Fl 
C) Fo 
D) Fu 
E) Fr

Question 9

An atom that has an atomic number of 20 and a mass number of 42 is an isotope of an atom that has

Accepted Answer

A) an atomic number of 21 and a mass number of 42. 
B) an atomic number of 20 and a mass number of 40. 
C) 22 neutrons and 20 protons. 
D) 22 protons and 20 neutrons. 
A) an atomic number of 21 and a mass number of 42. 
B) an atomic number of 20 and a mass number of 40. 
C) 22 neutrons and 20 protons. 
D) 22 protons and 20 neutrons.

Question 10

Isotopes differ in the number of

Accepted Answer

A) protons. 
B) neutrons. 
C) electrons. 
D) neutrons and electrons. 
E) protons and electrons. 
A) protons. 
B) neutrons. 
C) electrons. 
D) neutrons and electrons. 
E) protons and electrons.

Question 11

How many Li atoms are contained in 97.9 g of Li?

Accepted Answer

A) 5.90 × 1025 Li atoms 
B) 7.09 × 1021 Li atoms 
C) 8.49 × 1024 Li atoms 
D) 4.27 × 1022 Li atoms 
E) 4.18 × 1024 Li atoms 
A) 5.90 × 1025 Li atoms 
B) 7.09 × 1021 Li atoms 
C) 8.49 × 1024 Li atoms 
D) 4.27 × 1022 Li atoms 
E) 4.18 × 1024 Li atoms

Question 12

How many electrons does the Ca2+ ion possess?

Accepted Answer

A) 27 
B) 18 
C) 9 
D) 3 
E) 20 
A) 27 
B) 18 
C) 9 
D) 3 
E) 20

Question 13

What is the atomic mass for tin?

Accepted Answer

A) 47.87 
B) 50 
C) 118.71 
D) 22 
A) 47.87 
B) 50 
C) 118.71 
D) 22

Question 14

If 3.6 g of chlorine combines with sodium to make 6.0 g of sodium chloride,what mass of sodium is required?

Accepted Answer

A) 3.6 g 
B) 2.4 g 
C) 6.0 g 
D) 9.6 g 
E) 1.2 g 
A) 3.6 g 
B) 2.4 g 
C) 6.0 g 
D) 9.6 g 
E) 1.2 g

Question 15

How many iron atoms are contained in 354 g of iron?

Accepted Answer

A) 2.62 × 1025 Fe atoms 
B) 2.13 × 1026 Fe atoms 
C) 4.69 × 1024 Fe atoms 
D) 3.82 × 1024 Fe atoms 
E) 9.50 × 1022 Fe atoms 
A) 2.62 × 1025 Fe atoms 
B) 2.13 × 1026 Fe atoms 
C) 4.69 × 1024 Fe atoms 
D) 3.82 × 1024 Fe atoms 
E) 9.50 × 1022 Fe atoms

Question 16

Calculate the atomic mass of gallium if gallium has two naturally occurring isotopes with the following masses and natural abundances: 
Ga-69 $\quad$68.9256 u $\quad$60.11%
Ga-71 $\quad$70.9247 u $\quad$39.89%

Accepted Answer

A) 69.72 u 
B) 69.93 u 
C) 70.00 u 
D) 69.80 u 
E) 70.68 u 
A) 69.72 u 
B) 69.93 u 
C) 70.00 u 
D) 69.80 u 
E) 70.68 u

Question 17

What does "X" represent in the following symbol? $${ } _ { 14 } ^ { 28 } \mathrm { X }$$

Accepted Answer

A) silicon 
B) sulfur 
C) zinc 
D) ruthenium 
E) nickel 
A) silicon 
B) sulfur 
C) zinc 
D) ruthenium 
E) nickel

Question 18

What is the mass,in grams,of one mole of carbon?

Accepted Answer

A) 12.0107 × 1023 g 
B) 1.99 × 10-23 g 
C) 1.000 g 
D) 5.01 × 1022 g 
E) 12.0107 g 
A) 12.0107 × 1023 g 
B) 1.99 × 10-23 g 
C) 1.000 g 
D) 5.01 × 1022 g 
E) 12.0107 g

Question 19

Which of the following statements is TRUE?

Accepted Answer

A) Halogens are very reactive metals. 
B) The alkali metals are fairly reactive. 
C) Sulfur is a transition-group element. 
D) Noble gases readily form ionic compounds. 
E) Zn is a main-group metal. 
A) Halogens are very reactive metals. 
B) The alkali metals are fairly reactive. 
C) Sulfur is a transition-group element. 
D) Noble gases readily form ionic compounds. 
E) Zn is a main-group metal.

Question 20

Which of the following describes a nonmetal?

Accepted Answer

A) tend to gain electrons 
B) group 2 elements on the periodic table 
C) good conductor of electricity 
D) generally unreactive 
E) good conductor of heat 
A) tend to gain electrons 
B) group 2 elements on the periodic table 
C) good conductor of electricity 
D) generally unreactive 
E) good conductor of heat

Exam 2: Atoms and Elements

Which of the following elements is a nonmetal?

How many molecules are in 2.50 moles of CO2?

Identify a cation.

The atomic number is equal to the number of ________.

Which of the following elements has chemical properties similar to tellurium?

Predict the charge that a calcium ion would have.

Identify the symbol for fluorine.

An atom that has an atomic number of 20 and a mass number of 42 is an isotope of an atom that has

Isotopes differ in the number of

How many Li atoms are contained in 97.9 g of Li?

How many electrons does the Ca2+ ion possess?

What is the atomic mass for tin?

If 3.6 g of chlorine combines with sodium to make 6.0 g of sodium chloride,what mass of sodium is required?

How many iron atoms are contained in 354 g of iron?

Calculate the atomic mass of gallium if gallium has two naturally occurring isotopes with the following masses and natural abundances: Ga-69 \quad 68.9256 u \quad 60.11% Ga-71 \quad 70.9247 u \quad 39.89%

What does "X" represent in the following symbol? 1428X{ } _ { 14 } ^ { 28 } \mathrm { X }1428​X

What is the mass,in grams,of one mole of carbon?

Which of the following statements is TRUE?

Which of the following describes a nonmetal?

Units of Measurement for Physical and Chemical Change

Molecules,compounds,and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, valence Bond Theory, and Molecular Orbital Theory

Liquids, solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

How many molecules are in 2.50 moles of CO₂?

How many electrons does the Ca²⁺ ion possess?

Calculate the atomic mass of gallium if gallium has two naturally occurring isotopes with the following masses and natural abundances: Ga-69 $\quad$ 68.9256 u $\quad$ 60.11% Ga-71 $\quad$ 70.9247 u $\quad$ 39.89%

What does "X" represent in the following symbol? ${ } _ { 14 } ^ { 28 } \mathrm { X }$