Module 5 - Molecules And Ions V5

Question 1

Valence electrons are the outermost electrons in an atom and are used in bonding.

Answer 1

true

Question 2

What is one similarity between empirical formulas and molecular formulas?

Answer 2

they are both types of molecules

Question 3

Some molecules are formed through covalent bonds. Covalent bonds…

Answer 3

form when two or more atoms share their valence electrons between each other to gain stability.

Question 4

An ion is an atom that has gained or lost electrons.

Answer 4

true

Question 5

An atom that has lost one or more electrons resulting in a positive charge is the definition for which term?

Answer 5

cation

Question 6

An ionic compound is a group of atoms with either a positive or negative charge.

Answer 6

false

Question 7

What is the name of the ionic compound KCl?

Answer 7

potassium chloride

Question 8

Chemical nomenclature refers to the systematic naming and formula writing for chemical substances.

Answer 8

true

Question 9

Which of the following is not a diatomic molecule?

Answer 9

He2

Question 10

An isomer is two or more organic molecules with the same molecular formula, but different molecular structures.

Answer 10

true

Question 11

Hydrocarbons contain only…

Answer 11

carbon and hydrogen

Question 12

A carbon chain that contains an -OH group replacing a hydrogen is called an alkane.

Answer 12

false

Question 13

a compound…

Answer 13

consists of two or more elements.

Question 14

Molecules are formed by ________ bonds when elements share ________ with each other.

Answer 14

covalent; electrons

Question 15

Which of the following is an empirical formula?

Answer 15

NH3

Question 16

An experiment must be conducted to find a molecular formula.

Answer 16

true

Question 17

A scientist conducts an experiment involving methane gas, CH₄, and determines the molar mass of the sample to be 48g/mol. What is the molecular formula?

Answer 17

C3H12

Question 18

Ions are classified between two types based on their…

Answer 18

charge

Question 19

Cations ______ electrons resulting in a positive charge.

Answer 19

lose

Question 20

In hydrochloric acid, HCl, hydrogen is the _____ and chlorine is the _____.

Answer 20

cation; anion

Question 21

Anions are usually formed from…

Answer 21

nonmetals

Question 22

Boron has a charge of _____ and is considered a ______.

Answer 22

+3; cation

Question 23

The charge of fluorine (F) is…

Answer 23

-1

Question 24

What ionic compound will form from the bonding of sodium and the sulfate ions?

Answer 24

Na2SO4

Question 25

When hydrogen and chlorine bond to form hydrochloric acid, the compound is...

Answer 25

neutral

Question 26

When naming binary ionic compounds, the _____ is first and the ______ ends in -ide.

Answer 26

cation; anion

Question 27

What is the correct formula for magnesium iodide?

Answer 27

Mgl2

Question 28

Binary molecules are always composed of a metal and a nonmetal.

Answer 28

false

Question 29

What is the correct name for the binary compound P₂O₅ ?

Answer 29

diphosphorus pentoxide

Question 30

What is the name of a six carbon chain alkane?

Answer 30

hexane

Question 31

What is the name for a two carbon alkane chain with an alcohol group replacing one of the hydrogens?

Answer 31

ethanol

Question 32

Two lab partners conduct an experiment with hydrogen peroxide (H2O2) and find that the molar mass is 68 g/mol. Calculate the molecular formula.

Answer 32

H4O4

Question 33

Two or more elements chemically combined is the definition of which term?

Answer 33

compound

Question 34

Which is an example of an empirical formula? (Select all that apply.)

Answer 34

CH2, CH3, C2O3

Question 35

Which is an example of a molecular formula?

Answer 35

C4H6O2

Question 36

If the molecular formula is C4H6O10, what is its empirical formula?

Answer 36

C2H3O5

Question 37

Which of the following is not one of the diatomic molecules?

Answer 37

He2

Question 38

An atom that has gained one or more electrons resulting in a negative charge is the definition for which term?

Answer 38

anion

Question 39

Which of the following is the correct ion charge for potassium?

Answer 39

+1

Question 40

Which of the following is the correct charge for calcium?

Answer 40

+2

Question 41

Within the ionic compound NaCO3, which atom or group of atoms is considered the cation?

Answer 41

Na

Question 42

Within the ionic compound CaO, which atom or group of atoms is considered the anion?

Answer 42

O

Question 43

What is the formula for the ionic compound barium iodide?

Answer 43

Bal2

Question 44

What is the name of the binary molecular compound CO?

Answer 44

carbon monoxide

Question 45

What is the formula for the binary molecular compound sulfur hexafluoride?

Answer 45

SF6

Question 46

What is the formula for hydroiodic acid?

Answer 46

HI (aq)

Question 47

What is the charge of the cation in K3N?

Answer 47

+1

Question 48

Alcohols are different from alkanes because...

Answer 48

their carbon chains replaced a hydrogen with a hydroxyl group

Question 49

What is the name of C5H12?

Answer 49

pentane

Question 50

What is the name for a three carbon alkane chain?

Answer 50

propane

Question 51

What is the formula for Hexanol?

Answer 51

C6H13OH

Question 52

What is the name of C8H17OH?

Answer 52

octanol