Deck 3: Chemical Bonding

Question 1

What is the most abundant component of air?

A) oxygen
B) nitrogen
C) argon
D) carbon dioxide

Answer 1

B

Question 2

Which two gases make up almost all of air's volume?

A) oxygen and nitrogen
B) oxygen and carbon dioxide
C) carbon dioxide and nitrogen
D) carbon dioxide and hydrogen
E) nitrogen and hydrogen

Answer 2

A

Question 3

Which is the correct molecular formula for nitrogen gas?

A) NO₂
B) Ni
C) N₂
D) N

Answer 3

C

Question 4

Hemoglobin is involved in transport of

A) phosphate.
B) toxins.
C) energy.
D) oxygen.
E) nitrogen.

Question 5

Adenosine triphosphate (ATP) is used by the body as a source of

A) energy.
B) blood cells.
C) oxygen.
D) protein.
E) food.

Question 6

Nitrogen molecules that we inhale are used by the body for

A) food.
B) energy storage.
C) detoxification.
D) repairing damaged proteins.
E) nothing.

Question 7

Why is a neon atom more stable than a fluorine atom?

A) Neon is heavier than fluorine.
B) Neon has a filled valence electron shell, fluorine does not.
C) Fluorine has a filled valence electron shell, neon does not.
D) A fluorine atom has nine protons, while neon has ten.

Question 8

The bond that arises from the sharing of an electron pair between two atoms is called

A) covalent.
B) electronic.
C) isovalent.
D) ionic.
E) collinear.

Question 9

The correct Lewis dot structure for sulfur contains

A) two pairs of electrons and two unpaired electrons (six total).
B) one pair of electrons and two unpaired electrons (four total).
C) one pair of electrons and four unpaired electrons (six total).
D) one pair of electrons and three unpaired electrons (five total).
E) two pairs of electrons and no unpaired electrons (six total).

Question 10

The correct two-dimensional structure for hydrogen cyanide, HCN, contains

A) two double bonds.
B) one double and one single bond.
C) one triple and one single bond.
D) two single bonds.
E) two triple bonds.

Question 11

The correct two-dimensional structure for NCl₃ contains

A) three double bonds.
B) three single bonds.
C) two single and one double bond.
D) two double and one single bond.
E) two single and one triple bond.

Question 12

Draw the Lewis dot structure for phosphorus trichloride, PCl₃. How many bonding and non-bonding electron pairs surround the phosphorus atom?

A) one bonding, three non-bonding
B) three bonding, zero non-bonding
C) three bonding, one non-bonding
D) zero bonding, four non-bonding
E) two bonding, two non-bonding

Question 13

Draw the Lewis dot structure for chloroform, CHCl₃. How many bonding and non-bonding electron pairs surround the carbon atom?

A) four bonding, zero non-bonding
B) three bonding, zero non-bonding
C) one bonding, three non-bonding
D) zero bonding, four non-bonding
E) two bonding, two non-bonding

Question 14

Draw the Lewis dot structure for sulfur difluoride, SF₂. How many total non-bonding electron pairs are in the structure?

A) two
B) four
C) six
D) eight
E) ten

Question 15

Draw the Lewis dot structure for phosphine, PH₃. How many total bonding electron pairs are in the structure?

A) zero
B) one
C) two
D) three
E) four

Question 16

Draw the Lewis dot structure for carbon monoxide, CO. What kind of bond joins the carbon and the oxygen?

A) ionic
B) single covalent
C) double covalent
D) triple covalent

Question 17

Draw the Lewis dot structure for ethene, C₂H₄. What kind of bond joins the two carbon atoms?

A) ionic
B) single covalent
C) double covalent
D) triple covalent

Question 18

Draw the Lewis dot structure for bromine, Br₂. What kind of bond joins the two bromine atoms?

A) ionic
B) single covalent
C) double covalent
D) triple covalent

Question 19

Draw the Lewis dot structure for H₂CS. Carbon is the central atom. What kind of bond joins the carbon and the sulfur?

A) ionic
B) single covalent
C) double covalent
D) triple covalent

Question 20

Draw the Lewis dot structure for N₂O (nitrous oxide, or laughing gas). How many total bonding and non-bonding electron pairs are in the structure?

A) four bonding, two non-bonding
B) two bonding, two non-bonding
C) two bonding, four non-bonding
D) four bonding, four non-bonding

Question 21

The rule that states atoms will share, gain, or lose electrons to acquire a number in their valence shell equal to that of a noble gas is known as the ___________ rule.

A) stabilization
B) electron
C) quartet
D) octet
E) covalent

Question 22

What is the three-dimensional structure of phosphorus tribromide, PBr₃?

A) trigonal pyramidal
B) tetrahedral
C) triangular
D) bent
E) linear

Question 23

What is the three-dimensional structure of silicon tetrachloride, SiCl₄?

A) trigonal pyramidal
B) tetrahedral
C) triangular
D) bent
E) linear

Question 24

What is the three-dimensional structure of sulfur difluoride, SF₂?

A) trigonal pyramidal
B) tetrahedral
C) triangular
D) bent
E) linear

Question 25

What is the three-dimensional structure of nitrous oxide, N₂O (nitrogen is the central atom)?

A) trigonal pyramidal
B) tetrahedral
C) triangular
D) bent
E) linear

Question 26

Choose the molecule(s) with bond angles exactly equal to 109.5^o:
I) CBr₄
II) SF₂
III) SiCl₄
IV) PCl₃

A) I, III, and IV
B) I only
C) II only
D) I, II, and III
E) I and III

Question 27

Choose the molecule with the smallest bond angle.

A) NCl₃
B) CF₂Cl₂
C) OF₂
D) PCl₃
E) SiCl₄

Question 28

The protein found in bacteria, whose function is to enable the conversion of nitrogen gas into ammonia is called

A) bromelain.
B) cellulose.
C) ammoniase.
D) nitrogenase.
E) invertase.

Question 29

Which gas found in our atmosphere contributes to the greenhouse effect?

A) argon
B) oxygen
C) nitrogen
D) carbon dioxide

Question 30

Average global CO₂ levels in recent decades are

A) increasing.
B) decreasing.
C) remaining steady.
D) Not enough information is known to determine how they are changing.

Question 31

Radicals are highly reactive molecules that violate the octet rule in that they contain an

A) atom surrounded by fewer than eight electrons.
B) odd number of total electrons.
C) unpaired electron.
D) all of the above

Question 32

Identify which of the following species would be a radical:
I) ClO
II) NO₂
III) N₂O
IV) O₃

A) II and III
B) I and IV
C) II only
D) I, II, and III
E) I and II

Question 33

What is the three-dimensional structure of antimony pentafluoride, SbF₅?

A) trigonal planar
B) trigonal bipyramidal
C) tetrahedral
D) trigonal pyramidal

Question 34

What is the three-dimensional structure of xenon hexafluoride, XeF₆?

A) tetrahedral
B) octahedral
C) icosahedral
D) bent
E) trigonal bipyramidal

Question 35

What is the three-dimensional structure of the ammonium ion?

A) tetrahedral
B) trigonal pyramidal
C) trigonal
D) bent
E) trigonal bipyramidal

Question 36

Choose the element that would form an ion with charge +2.

A) Mg
B) Ba
C) Ca
D) all of the above

Question 37

Choose the element that would form an ion with charge -2.

A) Mg
B) F
C) S
D) P
E) Ne

Question 38

The charge of the ammonium ion is

A) +1.
B) +2.
C) -1.
D) -2.

Question 39

The charge of the nitrate ion is

A) +1.
B) +2.
C) -1.
D) -2.

Question 40

Choose the correct chemical formula for calcium nitrate.

A) CaNO₃
B) CaN
C) Ca₃N₂
D) Ca(NO₃)₂
E) Ca₂NO₃

Question 41

Choose the correct chemical formula for sodium phosphate.

A) Na₃PO₄
B) (Na)₃(PO)₄
C) NaPO₃
D) Na(PO₄)₃
E) Na₃O₄P

Question 42

Choose the correct chemical formula for magnesium nitride.

A) MgN₂
B) Mg₂N₃
C) Mg₃N₂
D) Mg(NO₃)₂
E) Mg₂NO₃

Question 43

Choose the correct chemical formula for ammonium phosphate.

A) (NH₄)₃PO₄
B) (NH₄)₃(PO)₄
C) NH₄(PO₄)₃
D) NH₄PO₄
E) (NH₄)(PO₄)

Question 44

What is another word for an ionic compound?

A) radical
B) salt
C) polyatomic
D) covalent
E) electronic

Question 45

Oxygen could form an ionic compound with

A) nitrogen.
B) phosphate.
C) chlorine.
D) sodium.
E) phosphorus.

Question 46

Lithium could form an ionic compound with

A) phosphate.
B) sodium.
C) beryllium.
D) ammonium.
E) calcium.

Question 47

Give the definition of a molecule.

Question 48

Argon is part of the family known as __________________ gases.

Question 49

Double bonds are __________________ and __________________ than single bonds.

Question 50

Draw the two-dimensional structure for carbon disulfide, CS₂.

Question 51

Although nitrogen is one of the essential elements for life, why do our bodies not use the nitrogen gas we breathe in?

Question 52

How is an ionic bond different from a covalent bond?

Question 53

Write the formula (including the charge) for the
a. phosphate ion. __________________
b. sulfate ion. __________________

Question 54

Predict the chemical formula of the salt formed by the following pairs of elements:
a. Ca and S __________________
b. Li and Cl __________________
c. K and O __________________
d. Na and N __________________

Question 55

Write chemical formulas for the following ionic compounds:
a. magnesium bromide ____________________
b. rubidium iodide ____________________
c. sodium sulfate ____________________
d aluminum carbonate ____________________

Question 56

Give names for the following ionic compounds:
a. K₂S _________________________
b. K₂SO₄ _________________________
c. Ca₃(PO₄)₂ _________________________
d. Li₃N _________________________