Question 1

How many protons and electrons are present in Co2+?

Accepted Answer

A) 27 protons, 27 electrons 
B) 27 protons, 29 electrons 
C) 27 protons, 25 electrons 
D) 29 protons, 27 electrons 
A) 27 protons, 27 electrons 
B) 27 protons, 29 electrons 
C) 27 protons, 25 electrons 
D) 29 protons, 27 electrons

Question 2

What is the electron configuration of an F- ion?

Accepted Answer

A) 1s22s22p4 
B) 1s22s22p5 
C) 1s22s22p6 
D) 1s22s22p63s1 
A) 1s22s22p4 
B) 1s22s22p5 
C) 1s22s22p6 
D) 1s22s22p63s1

Question 3

The chemical formulas of ionic compounds are written with the cation first, and then the anion, with subscripts to show how many of each are needed to have zero net charge.

Accepted Answer

A) True 
 B)False

Question 4

The symbol for the nitrite ion is NO2-.

Accepted Answer

A) True 
 B)False

Question 5

In bonding, main group elements _____ to attain the electronic configuration of the noble gas closest to them in the periodic table.

Accepted Answer

A) gain electrons 
B) lose electrons 
C) share electrons 
D) gain, lose, or share electrons 
A) gain electrons 
B) lose electrons 
C) share electrons 
D) gain, lose, or share electrons

Question 6

Strontium and barium form ions with the same charge.

Accepted Answer

A) True 
 B)False

Question 7

The carbonate ion contains the same number of oxygen atoms as the sulfate ion.

Accepted Answer

A) True 
 B)False

Question 8

If atoms with the electron-dot symbols shown below are combined, what is the formula of the ionic compound that is formed?

Accepted Answer

A) XY 
B) X2Y 
C) XY2 
D) X2Y2 
E) X3Y2 
A) XY 
B) X2Y 
C) XY2 
D) X2Y2 
E) X3Y2

Question 9

If atoms with the electron-dot symbols shown below are combined, what is the formula of the ionic compound that is formed?

Accepted Answer

A) XY 
B) X2Y 
C) XY2 
D) X2Y2 
E) X3Y2 
A) XY 
B) X2Y 
C) XY2 
D) X2Y2 
E) X3Y2

Question 10

Potassium sulfide has the chemical formula K2S.

Accepted Answer

A) True 
 B)False

Question 11

Which atom fits the electron-dot symbol shown below?

Accepted Answer

A) Li 
B) B 
C) N 
D) Na 
A) Li 
B) B 
C) N 
D) Na

Question 12

If the main group element has an electron-dot symbol of   , the charge of the resulting ion will be -2.

Accepted Answer

A) True 
 B)False

Question 13

The formula for the ammonium ion is _____.

Accepted Answer

The answer of The formula for the ammonium ion is...

Question 14

What is the formula for the ionic compound formed when potassium and bromine combine?

Accepted Answer

A) PBr 
B) KBr 
C) KBr2 
D) K2Br 
E) K7Br 
A) PBr 
B) KBr 
C) KBr2 
D) K2Br 
E) K7Br

Question 15

What is the ion symbol of the oxide ion?

Accepted Answer

A) O2- 
B) O22- 
C) O2 
D) O2+ 
E) O6- 
A) O2- 
B) O22- 
C) O2 
D) O2+ 
E) O6-

Question 16

What is the ion symbol for an atom with twenty (20)protons and eighteen (18)electrons?

Accepted Answer

A) Ca 
B) Ca2+ 
C) Ar 
D) Ar2+ 
E) Ar2- 
A) Ca 
B) Ca2+ 
C) Ar 
D) Ar2+ 
E) Ar2-

Question 17

A main group element is especially stable when it possesses eight total electrons.

Accepted Answer

A) True 
 B)False

Question 18

When magnesium forms an ion it gains two electrons.

Accepted Answer

A) True 
 B)False

Question 19

What is the chemical formula for the ionic compound calcium selenide?

Accepted Answer

A) Ca2Se2 
B) CaSe 
C) CaSe2 
D) Ca2Se 
A) Ca2Se2 
B) CaSe 
C) CaSe2 
D) Ca2Se

Question 20

Which compound has the highest melting point?

Accepted Answer

A) KCl 
B) CH4 
C) C6H12O6 
D) H2O 
A) KCl 
B) CH4 
C) C6H12O6 
D) H2O

Exam 3: Ionic Compounds

How many protons and electrons are present in Co2+?

What is the electron configuration of an F- ion?

The chemical formulas of ionic compounds are written with the cation first, and then the anion, with subscripts to show how many of each are needed to have zero net charge.

The symbol for the nitrite ion is NO2-.

In bonding, main group elements _____ to attain the electronic configuration of the noble gas closest to them in the periodic table.

Strontium and barium form ions with the same charge.

The carbonate ion contains the same number of oxygen atoms as the sulfate ion.

If atoms with the electron-dot symbols shown below are combined, what is the formula of the ionic compound that is formed?

If atoms with the electron-dot symbols shown below are combined, what is the formula of the ionic compound that is formed?

Potassium sulfide has the chemical formula K2S.

Which atom fits the electron-dot symbol shown below?

If the main group element has an electron-dot symbol of , the charge of the resulting ion will be -2.

The formula for the ammonium ion is _____.

What is the formula for the ionic compound formed when potassium and bromine combine?

What is the ion symbol of the oxide ion?

What is the ion symbol for an atom with twenty (20)protons and eighteen (18)electrons?

A main group element is especially stable when it possesses eight total electrons.

When magnesium forms an ion it gains two electrons.

What is the chemical formula for the ionic compound calcium selenide?

Which compound has the highest melting point?

Matter and Measurement

Atoms and the Periodic Table

Covalent Compounds

Chemical Reactions

Energy Changes, Reaction Rates, and Equilibrium

Gases, Liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen, Halogen, or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids, Esters, and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids, Proteins, and Enzymes

Nucleic Acids and Protein Synthesis

Digestion and the Conversion of Food Into Energy

Carbohydrate, Lipid, and Protein Metabolism

Filters

How many protons and electrons are present in Co²⁺?

What is the electron configuration of an F^- ion?

The symbol for the nitrite ion is NO₂^-.

Potassium sulfide has the chemical formula K₂S.