What is the correct Lewis structure for NH₃?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-3

Why is this Lewis Structure incorrect? Choose all that apply.

• There are too many bonds around Si.

• There should only be single bonds in this Lewis Structure.

• The Structure is missing a triple bond.

• Chlorine only has 6 electrons surrounding it.

Tags

NGSS.HS-PS1-2

According to the octet rule most elements need _______ valence electrons.

• 2
• 8
• 6
• 18

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Hydrogen needs _____ electrons in its valence shell to be stable.

• 4
• 6
• 8
• 2

Tags

NGSS.HS-PS1-1

A covalent bond is

• a bond that shares electrons metallicaly
• A bond that shares electrons with non metals
• Metalloids bonding
• metals and nonmetals bonding

Tags

NGSS.HS-PS1-1

Which of the following is the correct Lewis dot structure for the molecule fluorine (F₂)?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the correct structure for BF₃?

• Option A.
• Option B. 
• Option C.
• Option D.

How many valence electrons are in Phosphorus?

• 15
• 4
• 5
• 31

Tags

NGSS.HS-PS1-1

How many electrons does each line indicate are shared?

• 1
• 2
• 3
• 4

Which of the following elements are an exception to the octet rule and require less than 8 valence electrons?

• H

• Li

• B

• C