CHEM: CH 4 Practice Questions

Covalent bonds result from the ________ electrons between two atoms.

• transfer of 

• equal sharing of

• unequal sharing of

• Transfer of, equal sharing of, and unequal sharing of are correct

• Equal sharing of and unequal sharing of are correct

Tags

NGSS.HS-PS1-1

Identify the diatomic element from the given choices.

• chlorine

• carbon

• boron

• sulfur

• lithium

Which of the following compounds is classified as covalent?

• KCl

• LiBr

• HCl

• NaBr

• None of the choices are correct

What is another name for an unshared pair of electrons in a covalent compound?

• lone pair of electrons

• nonbonded electron pair

• bonding pair of electrons

• lone pair of electrons or nonbonded electron pair

Which of the statements concerning chemical bonds is false?

• The sharing of electrons between two nonmetal atoms results in a covalent bond

• The attraction between oppositely charged ions results in an ionic bond

• The term nonpolar is used to describe a covalent bond in which electrons are not shared equally

• A bond dipole is the separation of charge that results when atoms sharing electrons have different electronegativities

• Chemical bonding occurs only when atoms share valence electrons to achieve stability

Tags

NGSS.HS-PS1-1

How many covalent bonds are generally formed by atoms with five valence electrons?

• 1

• 2

• 3

• 4

• 5

Tags

NGSS.HS-PS1-1

How many lone pairs of electrons are present in the Lewis structure of ammonia, NH₃?

• 0

• 1

• 2

• 3

• 4

Aspartic acid is an amino acid used to synthesize proteins. How many lone pairs of electrons need to be added to complete the aspartic acid structure shown below?

• 4

• 6

• 8

• 9

• 11

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons are in a molecule of formaldehyde (CH₂O)?

• 16

• 12

• 10

• 8

• 0

Which of the following molecules contains more than one double bond in its Lewis structure?

• CS₂

• C₂H₂

• HCN

• CH₃OCH₃

• N₂H₂