7.5-7.9 HW Check

What is the bond order in a molecule of oxygen O₂?

You may need to ddraw Lewis structure.

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

How many nonbonded (lone) electron pairs are around the central atom in PH₃?

You may need to draw the Lewis structure.

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-1

When a valid Lewis structure is drawn, how many double bonds does this molecule contain?

• 1

• 2

• 3

• 4

Which choice best describes the central atom in the most acceptable Lewis structure for carbonyl chloride COCl₂?

• O, which forms a double bond to C.

• O, which forms a single bond to C

• C, which forms a double bond to O.

• C, which forms a single bond to O.

How many total electrons are in the valence shell of Br in BrI₄^- ion?

You may need to draw the Lewis structure.

• 8

• 10

• 12

• 14

Select the atoms that are capable of having an expanded octet?

• O

• N

• P

• S

• Se

Tags

NGSS.HS-PS1-1

Which of the following does NOT factor into molecular polarity?

• Asymmetry

• Nuclear charge

• Uneven electron distribution

• Lone electrons on the central atom

When more than one correct Lewis structure can be drawn for a molecule, the substance is said to have this quality?

• polarity

• coordination

• resonance

• electronegativity