Question 1

How many neutrons are in arsenic-42?

Accepted Answer

A) 33 
B) 41 
C) 42 
D) 41.9 
E) 75 
A) 33 
B) 41 
C) 42 
D) 41.9 
E) 75

Question 2

Why do elements in the same group tend to have similar chemical properties?

Accepted Answer

Since elements in the same group have th

Question 3

An atom of 118Xe contains ________ neutrons.

Accepted Answer

A) 54 
B) 172 
C) 64 
D) 110 
E) 118 
A) 54 
B) 172 
C) 64 
D) 110 
E) 118

Question 4

What is the atomic mass for cadmium?

Accepted Answer

A) 48 
B) 112.41 
C) 40.08 
D) 20 
A) 48 
B) 112.41 
C) 40.08 
D) 20

Question 5

Identify the charges of protons, neutrons, and electrons.

Accepted Answer

A) protons +1, neutrons 0, electrons -1 
B) protons 0, neutrons -1, electrons +1 
C) protons -1, neutrons 0, electrons +1 
D) protons 0, neutrons +1, electrons -1 
E) protons +1, neutrons -1, electrons 0 
A) protons +1, neutrons 0, electrons -1 
B) protons 0, neutrons -1, electrons +1 
C) protons -1, neutrons 0, electrons +1 
D) protons 0, neutrons +1, electrons -1 
E) protons +1, neutrons -1, electrons 0

Question 6

Predict the charge that an ion formed from bromine would have.

Accepted Answer

A) 1- 
B) 2+ 
C) 1+ 
D) 4+ 
E) 2- 
A) 1- 
B) 2+ 
C) 1+ 
D) 4+ 
E) 2-

Question 7

Are anions typically larger or smaller than their corresponding atom? Why?

Accepted Answer

Anions are larger than their correspondi

Question 8

Which element has the chemical symbol S?

Accepted Answer

A) selenium 
B) silicon 
C) sulfur 
D) scandium 
A) selenium 
B) silicon 
C) sulfur 
D) scandium

Question 9

How many moles of fructose are in a sample containing 1.43 × 1024 molecules of fructose?

Accepted Answer

A) 1.16 × 10-48mol 
B) 0.420 mol 
C) 8.61 × 1047 mol 
D) 2.38 mol 
E) 2.38 × 10-1 mol 
A) 1.16 × 10-48mol 
B) 0.420 mol 
C) 8.61 × 1047 mol 
D) 2.38 mol 
E) 2.38 × 10-1 mol

Question 10

An atom of 14C contains ________ protons.

Accepted Answer

A) 6 
B) 20 
C) 8 
D) 10 
E) 14 
A) 6 
B) 20 
C) 8 
D) 10 
E) 14

Question 11

What group of elements in the periodic table are the most unreactive and why?

Accepted Answer

The noble gases are the most u

Question 12

Predict the charge of the most stable ion of potassium.

Accepted Answer

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

Question 13

How many protons (p)and neutrons (n)are in an atom of barium-130?

Accepted Answer

A) 56 p, 74 n 
B) 56 p, 130 n 
C) 74 p, 56 n 
D) 130 p, 56 n 
A) 56 p, 74 n 
B) 56 p, 130 n 
C) 74 p, 56 n 
D) 130 p, 56 n

Question 14

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

Accepted Answer

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

Question 15

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

Question 16

Which of the following elements is a metalloid?

Accepted Answer

A) Al 
B) Ge 
C) C 
D) Sn 
E) Gd 
A) Al 
B) Ge 
C) C 
D) Sn 
E) Gd

Question 17

How many atoms are in 2.50 moles of CO2?

Accepted Answer

A) 4.52 × 1024 atoms 
B) 1.52 × 1024 atoms 
C) 5.02 × 1023 atoms 
D) 3.01 × 1024 atoms 
E) 7.53 × 1023 atoms 
A) 4.52 × 1024 atoms 
B) 1.52 × 1024 atoms 
C) 5.02 × 1023 atoms 
D) 3.01 × 1024 atoms 
E) 7.53 × 1023 atoms

Question 18

Which of the following represent isotopes?

Accepted Answer

A) A and B 
B) A and C 
C) A and D 
D) C and D 
A) A and B 
B) A and C 
C) A and D 
D) C and D

Question 19

Identify the largest atom or ion of carbon.

Accepted Answer

A) p+ = 6 n° = 6 e- = 6 
B) p+ = 6 n° = 7 e- = 6 
C) p+ = 6 n° = 6 e- = 7 
D) p+ = 6 n° = 6 e- = 5 
A) p+ = 6 n° = 6 e- = 6 
B) p+ = 6 n° = 7 e- = 6 
C) p+ = 6 n° = 6 e- = 7 
D) p+ = 6 n° = 6 e- = 5

Question 20

What does "X" represent in the following symbol?

Accepted Answer

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

Exam 2: Atoms and Elements

How many neutrons are in arsenic-42?

Why do elements in the same group tend to have similar chemical properties?

An atom of 118Xe contains ________ neutrons.

What is the atomic mass for cadmium?

Identify the charges of protons, neutrons, and electrons.

Predict the charge that an ion formed from bromine would have.

Are anions typically larger or smaller than their corresponding atom? Why?

Which element has the chemical symbol S?

How many moles of fructose are in a sample containing 1.43 × 1024 molecules of fructose?

An atom of 14C contains ________ protons.

What group of elements in the periodic table are the most unreactive and why?

Predict the charge of the most stable ion of potassium.

How many protons (p)and neutrons (n)are in an atom of barium-130?

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

Which of the following describes a nonmetal?

Which of the following elements is a metalloid?

How many atoms are in 2.50 moles of CO2?

Which of the following represent isotopes?

Identify the largest atom or ion of carbon.

What does "X" represent in the following symbol?

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 Metallury

Transition Metals and Coordination Compounds

Filters

An atom of 118_Xe contains ________ neutrons.

How many moles of fructose are in a sample containing 1.43 × 10²⁴molecules of fructose?

An atom of ¹⁴C contains ________ protons.

How many atoms are in 2.50 moles of CO₂?