Quiz about New Unit 3 Review

Question 1

What is the correct name for MgF2?

Accepted Answer

magnesium fluoride

Answer

magnesium difluoride

Answer

monomagnesium fluoride

Answer

monomagnesium difluoride

Question 2

What is the name of the compound with the formula CaI2?

Accepted Answer

calcium iodide

Answer

calcium iodine

Answer

calcium iodate

Answer

calcium diiodide

Question 3

Which type of compound is usually formed when a metal reacts with a nonmetal?

Accepted Answer

ionic

Answer

allotropic

Answer

molecular

Answer

organic

Question 4

Which of the following is the correct name for the compound SO3?

Accepted Answer

sulfur trioxide

Answer

monosulfur dioxide

Answer

trisulfur monoxide

Answer

trisulfur oxide

Question 5

Which of the following is the correct way to write the formula for the compound carbon tetrafluoride?

Accepted Answer

CF4

Answer

CF2

Answer

C2F2

Answer

C4F

Question 6

Which of the following is the correct way to write the formula for the compound diphosphorus pentoxide?

Accepted Answer

P2O5

Answer

P2O4

Answer

PO4

Answer

P5O

Question 7

Calcium (Ca) is in the second column of the periodic table and is classified as an alkaline earth metal. Which of the following formulas shows the ratio of a compound formed from calcium and iodine (I)?

Accepted Answer

CaI2

Answer

CaI

Answer

Ca2I

Answer

CaI3

Question 8

NaCl and KBr are ionic compounds. H2O and C6H12O6 are covalent compounds. How does Vanessa describe the difference between the melting points and elemental compositions of ionic and covalent compounds?

Accepted Answer

Ionic compounds have higher melting points than covalent compounds. Ionic compounds are composed of a metal and a nonmetal while covalent compounds are composed of all nonmetals.

Answer

Ionic compounds have higher melting points than covalent compounds. Ionic compounds are composed of all nonmetals while covalent compounds are composed of a metal and a nonmetal.

Answer

Ionic compounds have lower melting points than covalent compounds. Ionic compounds are composed of a metal and a nonmetal while covalent compounds are composed of all nonmetals.

Answer

Ionic compounds have melting points that are similar to covalent compounds. Ionic compounds are composed of a metal and a nonmetal while covalent compounds are composed of all nonmetals.

Question 9

What is the chemical bond that is formed when two atoms share one or more pairs of electrons?

Accepted Answer

covalent bond

Answer

ionic bond

Answer

orbital bond

Answer

polar bond

Question 10

Which of the following is a property of an ionic compound?

Accepted Answer

conducts electricity when aqueous

Answer

has a low boiling point

Answer

forms molecules

Answer

is soft and flexible

Question 11

What is the sum of the charges in a compound?

Accepted Answer

0

Answer

+1

Answer

-1

Answer

+2

Question 12

What is the overall charge of the compound sodium chloride?

Accepted Answer

0

Answer

-2

Answer

+1

Answer

+3

Question 13

When do ionic bonds occur?

Accepted Answer

when electrons are tranferred

Answer

When protons are exchanged

Answer

when electrons are shared

Answer

when neutrons are exchanged

Question 14

When fluorine (F) forms chemical compounds with metals, the fluorine atom

Accepted Answer

gains electrons

Answer

fuses electrons

Answer

loses electrons

Answer

shares electrons

Question 15

Which is the chemical formula for magnesium phosphide?

Accepted Answer

Mg3P2

Answer

Mg2P3

Answer

Mg2P

Answer

MgP2

Question 16

If an ionic compound formed between an element from the first column of the periodic table and another from the sixth column, you would expect the compound to include

Accepted Answer

two atoms of the element from the first column and one atom of the element from the sixth column.

Answer

one atom from each of the two different elements.

Answer

one atom of the element in the first column and two atoms of the element from the sixth column.

Answer

three atoms of the element from the first column and two atoms of the element from the sixth column.

Question 17

Hydrofluoric acid is an extremely strong acid with a pH of 2.1. What is the chemical formula for the reaction between hydrogen and fluorine to make the hydrofluoric acid?

Accepted Answer

HF

Answer

H2F

Answer

HF2

Answer

H2F3

Question 18

Which chemical formula represents a covalent compound because they share electrons?

Accepted Answer

CO2

Answer

NaCl

Answer

MgO

Answer

KI

Question 19

Why does the compound sodium fluoride contain an ionic bond?

Accepted Answer

The sodium transfers one electron to the fluorine to fulfill the octet rule.

Answer

The fluorine transfers one electron to the sodium to fulfill the octet rule.

Answer

The fluorine must share an electron with the sodium in order to fulfill the octet rule.

Answer

The sodium must share an electron with the fluorine in order to fulfill the octet rule.

Question 20

Which compound is composed of the GREATEST number of atoms?

Accepted Answer

potassium nitride

Answer

carbon dioxide

Answer

dinitrogen monoxide

Answer

sodium chloride

Question 21

Hector claims that a single sodium ion and a single oxygen ion do not bond together to form a stable binary ionic compound. Is he correct? Why or why not?

Accepted Answer

Hector is correct. The sum of the charges of the two ions must be zero in order for them to form a stable ionic compound.

Answer

Hector is incorrect. The two ions have opposite charges, so they will bond together in a binary ionic compound.

Answer

Hector is incorrect. The two ions have more than eighteen protons, so they will bond together in a binary ionic compound.

Answer

Hector is correct. The sum of the protons of the two ions must be divisible by eight in order for them to form a stable ionic compound.

Question 22

One molecule of dinitrogen tetroxide contains

Accepted Answer

two nitrogen atoms and four oxygen atoms.

Answer

two nitrogen atoms and two oxygen atoms.

Answer

four nitrogen atoms and two oxygen atoms.

Answer

four nitrogen atoms and four oxygen atoms.

Question 23

Potassium (K), an alkali metal, and magnesium (Mg), an alkaline earth metal, both combine readily with bromine (Br), a halogen. What compound will each element (K and Mg) most likely form with bromine?

Accepted Answer

KBr and MgBr₂

Answer

KBr and Mg₂Br

Answer

KBr and MgBr

Answer

K₂Br and Mg₂Br

Question 24

Which of the following statements is true with regard to bonds?

Accepted Answer

Ionic bonds require positive and negative charges, while covalent bonds require the sharing of electrons.

Answer

Ionic bonds and covalent bonds have exactly the same properties.

Answer

Ionic bonds require the sharing of electrons, while covalent bonds do not.

Answer

Ionic bonds and covalent bonds both require the transfer of protons and occur primarily between nonmetals.

Question 25

The compound gallium iodide, is often used in creating crystals for computer chips. Which of the following best describes the chemical formula of gallium iodide?

Accepted Answer

GaI3

Answer

GaI

Answer

Ga3I

Answer

Ga2I3

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