Question 1

-Which of these atoms has the greatest number of neutrons in its nucleus?

Accepted Answer

A)    Mn 
B)    Co 
C)    Fe 
D)    Ni 
E)    Si 
A)    Mn 
B)    Co 
C)    Fe 
D)    Ni 
E)    Si

Question 2

Barium belongs to the ________ group of the periodic table.

Accepted Answer

A) alkali metal 
B) alkaline earth metal 
C) halogen 
D) noble gas 
A) alkali metal 
B) alkaline earth metal 
C) halogen 
D) noble gas

Question 3

If the density of lead is 11.34 g/cm3,how many atoms are in a piece of lead that is 2.00 cm wide,1.00 m long,and 2.00 mm thick?

Accepted Answer

A) 1.32 × 1024 atoms 
B) 1.16 × 1023 atoms 
C) 1.32 × 1023 atoms 
D) 1.16 × 1022 atoms 
E) 6.60 × 1023 atoms 
A) 1.32 × 1024 atoms 
B) 1.16 × 1023 atoms 
C) 1.32 × 1023 atoms 
D) 1.16 × 1022 atoms 
E) 6.60 × 1023 atoms

Question 4

What is the proper   E notation for an ion having 35 protons,36 electrons and 45 neutrons?

Accepted Answer

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

Question 5

A 0.920-gram sample of magnesium is allowed to burn in 0.321 g of oxygen gas.The sole product is magnesium oxide.After the reaction,no oxygen remains and 0.809 g of magnesium oxide has been formed.What mass of magnesium is left unreacted?

Accepted Answer

A) 0.210 g 
B) 0.432 g 
C) 1.408 g 
D) 0.111 g 
E) 0.488 g 
A) 0.210 g 
B) 0.432 g 
C) 1.408 g 
D) 0.111 g 
E) 0.488 g

Question 6

How many arsenic atoms are in 5.21 g of arsenic?

Accepted Answer

A) 0.0695 atoms 
B) 9.51 × 1022 atoms 
C) 3.14 × 1024 atoms 
D) 2.10 × 1022 atoms 
E) 4.19 × 1022 atoms 
A) 0.0695 atoms 
B) 9.51 × 1022 atoms 
C) 3.14 × 1024 atoms 
D) 2.10 × 1022 atoms 
E) 4.19 × 1022 atoms

Question 7

The mass number of an atom of 14C is:

Accepted Answer

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

Question 8

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 9

In which of the following sets do all species have the same number of electrons?

Accepted Answer

A) F-,Ne,Mg2+ 
B) Ge,Se2-,Br- 
C) K+,Rb+,Cs+ 
D) Br,Br-,Br+ 
A) F-,Ne,Mg2+ 
B) Ge,Se2-,Br- 
C) K+,Rb+,Cs+ 
D) Br,Br-,Br+

Question 10

The vertical columns in the periodic table of the elements are called groups.

Accepted Answer

A) True 
 B)False

Question 11

Main group elements are those in groups ________.

Accepted Answer

A) 1 and 2 
B) 1,2,and 13 to 18 
C) 13 to 18 
D) 1 and 18 
E) 3 to 12 
A) 1 and 2 
B) 1,2,and 13 to 18 
C) 13 to 18 
D) 1 and 18 
E) 3 to 12

Question 12

Which of the following would be unaffected by an electric field?

Accepted Answer

A) alpha particles 
B) beta particles 
C) gamma rays 
D) protons 
E) electrons 
A) alpha particles 
B) beta particles 
C) gamma rays 
D) protons 
E) electrons

Question 13

There are two stable isotopes of supposium (Su).
Su-191 = 190.9609 u (27.30%)Su-194 = 193.9633 u (72.70%)
Compute the atomic mass of supposium.

Accepted Answer

A) 190.9 u 
B) 194.0 u 
C) 191.8 u 
D) 192.5 u 
E) 193.1 u 
A) 190.9 u 
B) 194.0 u 
C) 191.8 u 
D) 192.5 u 
E) 193.1 u

Question 14

Write the appropriate symbol for the species containing 18 neutrons,17 protons,and 16 electrons.

Accepted Answer

A)      
B)      
C)      
D)      
E)      
A)      
B)      
C)      
D)      
E)

Question 15

Atoms retain their identity during a chemical reaction.

Accepted Answer

A) True 
 B)False

Question 16

A hypothetical element,E,has two stable isotopes.
E-38 = 38.012 u 75.68%
E-46 = 45.981 u 24.32%
The element's atomic mass would be closest to which of the elements?

Accepted Answer

A) K 
B) Ar 
C) Ca 
D) Sc 
E) Cl 
A) K 
B) Ar 
C) Ca 
D) Sc 
E) Cl

Question 17

Choose the INCORRECT statement.

Accepted Answer

A) The law of constant composition is the law of definite proportions. 
B) Objects of like charge repel each other. 
C) Electrons were once known as cathode rays. 
D) Alpha particles are the same mass as a helium nucleus. 
E) Gamma rays are the same as electrons. 
A) The law of constant composition is the law of definite proportions. 
B) Objects of like charge repel each other. 
C) Electrons were once known as cathode rays. 
D) Alpha particles are the same mass as a helium nucleus. 
E) Gamma rays are the same as electrons.

Question 18

An anion has 45 neutrons and 36 electrons.If it has a -1 charge,what is its correct symbol?

Accepted Answer

A)      
B)      
C)      
D)      
E)      
A)      
B)      
C)      
D)      
E)

Question 19

What is the mass number of the most abundant form of oxygen atom?

Accepted Answer

A) 15.9994 
B) 8 
C) 16 
D) 24 
E) 32 
A) 15.9994 
B) 8 
C) 16 
D) 24 
E) 32

Question 20

A cation has 28 neutrons and 21 electrons.If it has a +3 charge,what is its correct symbol?

Accepted Answer

A)      
B)      
C)      
D)      
E)      
A)      
B)      
C)      
D)      
E)

Exam 2: Atoms and the Atomic Theory

-Which of these atoms has the greatest number of neutrons in its nucleus?

Barium belongs to the ________ group of the periodic table.

If the density of lead is 11.34 g/cm3,how many atoms are in a piece of lead that is 2.00 cm wide,1.00 m long,and 2.00 mm thick?

What is the proper E notation for an ion having 35 protons,36 electrons and 45 neutrons?

A 0.920-gram sample of magnesium is allowed to burn in 0.321 g of oxygen gas.The sole product is magnesium oxide.After the reaction,no oxygen remains and 0.809 g of magnesium oxide has been formed.What mass of magnesium is left unreacted?

How many arsenic atoms are in 5.21 g of arsenic?

The mass number of an atom of 14C is:

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

In which of the following sets do all species have the same number of electrons?

The vertical columns in the periodic table of the elements are called groups.

Main group elements are those in groups ________.

Which of the following would be unaffected by an electric field?

There are two stable isotopes of supposium (Su). Su-191 = 190.9609 u (27.30%)Su-194 = 193.9633 u (72.70%) Compute the atomic mass of supposium.

Write the appropriate symbol for the species containing 18 neutrons,17 protons,and 16 electrons.

Atoms retain their identity during a chemical reaction.

A hypothetical element,E,has two stable isotopes. E-38 = 38.012 u 75.68% E-46 = 45.981 u 24.32% The element's atomic mass would be closest to which of the elements?

Choose the INCORRECT statement.

An anion has 45 neutrons and 36 electrons.If it has a -1 charge,what is its correct symbol?

What is the mass number of the most abundant form of oxygen atom?

A cation has 28 neutrons and 21 electrons.If it has a +3 charge,what is its correct symbol?

Matter: Its Properties and Measurement

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

If the density of lead is 11.34 g/cm³,how many atoms are in a piece of lead that is 2.00 cm wide,1.00 m long,and 2.00 mm thick?

The mass number of an atom of ¹⁴C is: