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General Chemistry - Chemistry I and Lab > Module 5 - Molecules And Ions V5 > Flashcards

Module 5 - Molecules And Ions V5 Flashcards

1
Q

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

A

true

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2
Q

What is one similarity between empirical formulas and molecular formulas?

A

they are both types of molecules

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3
Q

Some molecules are formed through covalent bonds. Covalent bonds…

A

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

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4
Q

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

A

true

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5
Q

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

A

cation

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6
Q

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

A

false

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7
Q

What is the name of the ionic compound KCl?

A

potassium chloride

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8
Q

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

A

true

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9
Q

Which of the following is not a diatomic molecule?

A

He2

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10
Q

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

A

true

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11
Q

Hydrocarbons contain only…

A

carbon and hydrogen

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12
Q

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

A

false

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13
Q

a compound…

A

consists of two or more elements.

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14
Q

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

A

covalent; electrons

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15
Q

Which of the following is an empirical formula?

A

NH3

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16
Q

An experiment must be conducted to find a molecular formula.

A

true

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17
Q

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?

A

C3H12

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18
Q

Ions are classified between two types based on their…

A

charge

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19
Q

Cations ______ electrons resulting in a positive charge.

A

lose

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20
Q

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

A

cation; anion

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21
Q

Anions are usually formed from…

A

nonmetals

22
Q

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

A

+3; cation

23
Q

The charge of fluorine (F) is…

A

-1

24
Q

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

A

Na2SO4

25
Q

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

A

neutral

26
Q

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

A

cation; anion

27
Q

What is the correct formula for magnesium iodide?

A

Mgl2

28
Q

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

A

false

29
Q

What is the correct name for the binary compound P₂O₅ ?

A

diphosphorus pentoxide

30
Q

What is the name of a six carbon chain alkane?

A

hexane

31
Q

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

A

ethanol

32
Q

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

A

H4O4

33
Q

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

A

compound

34
Q

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

A

CH2, CH3, C2O3

35
Q

Which is an example of a molecular formula?

A

C4H6O2

36
Q

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

A

C2H3O5

37
Q

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

A

He2

38
Q

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

A

anion

39
Q

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

A

+1

40
Q

Which of the following is the correct charge for calcium?

A

+2

41
Q

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

A

Na

42
Q

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

A

O

43
Q

What is the formula for the ionic compound barium iodide?

A

Bal2

44
Q

What is the name of the binary molecular compound CO?

A

carbon monoxide

45
Q

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

A

SF6

46
Q

What is the formula for hydroiodic acid?

A

HI (aq)

47
Q

What is the charge of the cation in K3N?

A

+1

48
Q

Alcohols are different from alkanes because…

A

their carbon chains replaced a hydrogen with a hydroxyl group

49
Q

What is the name of C5H12?

A

pentane

50
Q

What is the name for a three carbon alkane chain?

A

propane

51
Q

What is the formula for Hexanol?

A

C6H13OH

52
Q

What is the name of C8H17OH?

A

octanol

General Chemistry - Chemistry I and Lab (11 decks)

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