Deck 5: Chemical Bonding and Nomenclature

Question 1

How many valence electrons are needed to construct the Lewis dot structure of the BCl₃ molecule?

A)11
B)21
C)24
D)32

Answer 1

24

Question 2

What is the chemical formula of rhenium(VII)oxide?

A)ReO₇
B)ReO₄
C)Re₂O₇
D)Re₃O₆

Answer 2

Re₂O₇

Question 3

Which of the following covalent bonds would you expect to be the least polar?

A)C-C
B)C-H
C)C-F
D)C-Cl

Answer 3

C-C

Question 4

How many valence electrons does a single, neutral iodine atom have?

A)3
B)4
C)5
D)7

Question 5

How many covalent bonds can an element of Group VA form with other elements?

A)4
B)3
C)2
D)1

Question 6

Which of the following statements best describes an ionic bond?

A)a strong lattice of positively and negatively charged atoms held together by electrical forces
B)the bonding type present in bound, non-metal atoms
C)the equal sharing of two electrons between adjacent atoms
D)the bonding type present between two metal atoms

Question 7

Which of the following represents the correct Lewis dot structure for selenium (Se)?

A)

B)

C)

D)

Question 8

What is the chemical formula of calcium phosphate?

A)CaPO₄
B)Ca₂PO₄
C)Ca₃PO₄
D)Ca₃(PO₄)₂

Question 9

Which of the following substances is molecular (composed of individual molecules)in composition?

A)carbon, as coal
B)water, as a glass of water
C)copper, as an ingot
D)helium, as found in a balloon

Question 10

Which of the following covalent bonds would you expect to be the most polar?

A)C-C
B)C-H
C)C-F
D)C-Cl

Question 11

Which of the following is considered an elemental substance?

A)I₂ (iodine)
B)H₂O (water)
C)Fe (an iron nail)
D)A and C are elemental substances.
E)All of the preceding are elemental substances.

Question 12

What is the most likely formula of the neutral, ionic compound formed by lithium and nitrogen?

A)Li₂N
B)Li₃N
C)LiN
D)LiN₂

Question 13

Which of the following bonds would you expect to be ionic?

A)C-S
B)Na-F
C)N-O
D)F-F

Question 14

To follow the octet rule, how many electrons must a neutral sulfur atom gain when forming a negative ion?

A)1
B)2
C)6
D)8

Question 15

How many covalent bonds can a single oxygen atom form with other elements?

A)3
B)4
C)2
D)1

Question 16

Which of the following phrases best describes the H-O bonds present in water (H₂O)?

A)nonpolar and ionic
B)nonpolar and covalent
C)polar and ionic
D)polar and covalent

Question 17

How many unpaired electrons does the oxide anion (O^2-)have?

A)3
B)2
C)1
D)0

Question 18

What is the most likely formula of the neutral, ionic compound formed by magnesium and oxygen?

A)Mg₂O
B)MgO₂
C)Mg₃O₂
D)MgO

Question 19

What is the chemical name of the compound whose formula is K₂O?

A)dipotassium oxygen
B)potassium oxide
C)potasside oxygen
D)potassium oxygen

Question 20

Which phrase best describes a covalent bond between two atoms?

A)a stable arrangement of charged atoms held together by electrostatic forces
B)a stable arrangement of atoms made by sharing two electrons between adjacent atoms
C)uncommon, as electrons are free to jump from one atom to another
D)an exchange of nuclei between two atoms

Question 21

A binary covalent compound is composed of ________.

A)two metalloids
B)a metal and a non-metal
C)two non-metals
D)either A or C

Question 22

Every single COVALENT bond represents ________ electrons.

A)one
B)two
C)four
D)One cannot say unless the atoms that make up the bond are known.

Question 23

If the electrons are shared equally between the two atoms, the bond is called ________.

A)ionic
B)non-polar covalent
C)hydrogen bonding
D)polar covalent

Question 24

Which of the following is a binary compound?

A)sodium perchlorate
B)sodium chlorate
C)sodium hypochlorite
D)sodium chloride

Question 25

When a binary compound is composed of a metal and a non-metal it is called ________.

A)binary ionic
B)binary covalent
C)binary coordinate
D)either B or C

Question 26

Which of the following compounds has a covalent bond?

A)NaCl
B)KBr
C)LiH
D)H₂

Question 27

Which of the following sets is comprised exclusively of ionic binary compounds?

A)H₂O, SiO₂, NO
B)CoCl₂, CaCO₃, AlPO₄
C)Co(H₂PO₄)₂, KCl, PCl₃
D)KI, Al₂O₃, Li₂S

Question 28

When electrons in a bond are shared unequally the bond is ________.

A)ionic
B)non-polar covalent
C)hydrogen bonding
D)polar covalent

Question 29

Which of the following is not a binary compound?

A)sodium chloride
B)sodium hypochlorite
C)sodium sulfide
D)sodium hydride

Question 30

Which is not a binary covalent compound?

A)CO
B)H₂O
C)CaF₂
D)SiO₂

Question 31

The numerical rating of an atom's ability to attract the shared electrons is called ________.

A)electronegativity
B)ionization
C)covalency
D)redistribution

Question 32

Which of the following sets is comprised exclusively of covalent binary compounds?

A)H₂O, SiO₂, NO
B)CoCl₂, CaCO₃, AlPO₄
C)Co(H₂PO₄)₂, KCl, PCl₃
D)KI, Al₂O₃, Li₂S

Question 33

When the valence electrons between atoms are transferred the bond is called ________.

A)ionic
B)covalent
C)hydrogen bonding
D)polar covalent

Question 34

What is the chemical formula of a compound named ammonium sulfide?

A)NH₄S
B)(NH₄)₂S
C)(NH₄)S₂
D)(NH₄)₂S₃

Question 35

The number of valence electrons in silicon is ________.

A)2
B)4
C)6
D)8

Question 36

What is the chemical name of the compound whose formula is MgSO₄?

A)There is no such compound.
B)magnesium sulfur tetraoxide
C)magnesium sulfide
D)magnesium sulfate

Question 37

What is the chemical formula of the compound named potassium bicarbonate?

A)KHCO₃
B)K₂(HCO₃)
C)K(HCO₃)₂
D)K₃HCO₃

Question 38

Which of the following is a binary ionic compound?

A)potassium sulfide
B)phosphorus trichloride
C)sulfur hexafluoride
D)water

Question 39

Which of the following is not a binary ionic compound?

A)lithium sulfide
B)potassium iodide
C)calcium chloride
D)hydrogen sulfide

Question 40

What is the chemical name given to the compound whose formula is N₂O₄?

A)nitrogen quadraoxide
B)nitrogen (IV)oxide
C)nitrogen (II)oxygen (IV)
D)dinitrogen tetraoxide

Question 41

Which of the following elements has the lowest number of valence electrons?

A)magnesium
B)lithium
C)argon
D)phosphorus

Question 42

The expected formula between silicon and fluorine is ________.

A)SiF
B)SiF₂
C)SiF₄
D)SiF₆

Question 43

Which of the following pairs has the same number valence electrons?

A)magnesium and potassium
B)lithium and calcium
C)argon and xenon
D)phosphorus and tellurium

Question 44

The expected binary compound between magnesium and bromine is ________.

A)MgBr
B)MgBr₂
C)Mg₂Br
D)Mg₂Br₂

Question 45

Which of the following has the same number of valence electrons as sulfur?

A)nitrogen
B)oxygen
C)arsenic
D)boron

Question 46

The number of valence electrons in sulfur is ________.

A)2
B)4
C)6
D)8

Question 47

Which of the following elements has the highest number of valence electrons?

A)magnesium
B)lithium
C)argon
D)phosphorus

Question 48

The expected formula between calcium and oxygen is ________.

A)CaO
B)CaO₂
C)Ca₂O
D)Ca₂O₅

Question 49

The number of valence electrons in aluminum is ________.

A)2
B)3
C)5
D)7

Question 50

The number of valence electrons in nitrogen is ________.

A)2
B)3
C)5
D)6

Question 51

Which of the following is the least electronegative?

A)fluorine
B)oxygen
C)carbon
D)sodium

Question 52

The expected formula between calcium and iodine is ________.

A)CaI
B)Cal₂
C)Ca₂I
D)Ca₂I₃

Question 53

The expected formula between magnesium and sulfur is ________.

A)MgS
B)MgS₂
C)Mg₂S
D)Mg₂S₃

Question 54

The expected formula between sodium and oxygen is ________.

A)NaO
B)Na₂O
C)NaO₂
D)Na₂O₃

Question 55

The expected formula between aluminum and oxygen is ________.

A)AlO
B)AlO₂
C)Al₂O
D)Al₂O₃

Question 56

The number of valence electrons in oxygen is ________.

A)2
B)4
C)6
D)8

Question 57

Which of the following elements has the least number of valence electrons?

A)magnesium
B)lithium
C)argon
D)phosphorus

Question 58

Which of the following is the most electronegative?

A)fluorine
B)oxygen
C)carbon
D)sodium

Question 59

Which of the following does not have the same number of valence electrons as the other three elements?

A)nitrogen
B)phosphorus
C)beryllium
D)arsenic

Question 60

The number of valence electrons in neon is ________.

A)2
B)4
C)6
D)8

Question 61

Which of the following may not exist as a diatomic molecule?

A)oxygen
B)nitrogen
C)argon
D)hydrogen

Question 62

Nitrogen trifluoride has ________ bonds, ________ of which are single bonds.

A)3; 3
B)5; 1
C)7; 2
D)8; 3

Question 63

Phosphine, PH₃, has ________ covalent pairs and ________ lone pairs.

A)3; 0
B)3; 1
C)3; 2
D)2; 0

Question 64

What is the number of single bonds in C₂H₆O?

A)5
B)6
C)7
D)8

Question 65

Each atom in the oxygen molecule contributes ________ valence electrons for a total of ________ electrons

A)6; 12
B)6; 8
C)8; 6
D)12; 6

Question 66

Methane has ________ covalent bonds and ________ lone pairs.

A)4; 2
B)4; 1
C)4; 0
D)2; 4

Question 67

Hydrazine, N₂H₄, has ________ covalent bonds and ________ lone pairs.

A)2; 2
B)4; 2
C)3; 4
D)5; 2

Question 68

The number of valence electrons in the nitrate anion is ________.

A)23
B)24
C)28
D)30

Question 69

Nitrogen trifluoride has ________ valence electrons.

A)20
B)22
C)24
D)26

Question 70

Hydrazine has ________ valence electrons.

A)14
B)12
C)10
D)8

Question 71

The expected formula between hydrogen and nitrogen is ________.

A)HN
B)NH₂
C)NH₃
D)NH₄

Question 72

Acetylene, C₂H₂, has ________.

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

Question 73

The number of valence electrons that belong to the oxygens in the carbonate anion is ________.

A)15
B)18
C)20
D)24

Question 74

The central atom in sulfuric acid is ________.

A)oxygen
B)sulfur
C)hydrogen
D)none of the above

Question 75

Water has ________ covalent bonds and ________ lone pairs.

A)2; 2
B)2; 4
C)2; 0
D)2; 6

Question 76

Nitrogen trifluoride has ________ valence electrons that are contributed by the nitrogen atom.

A)5
B)8
C)10
D)12

Question 77

The expected formula between potassium and sulfur is ________.

A)KS
B)K₂S₃
C)K₂S
D)KS₂

Question 78

The number of valence electrons in the carbonate anion is ________.

A)20
B)22
C)24
D)26

Question 79

The phosphate anion has ________ valence electrons.

A)29
B)30
C)32
D)36

Question 80

Which of the following exists as a diatomic molecule?

A)neon
B)oxygen
C)phosphorus
D)silicon