Lewis Structure

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

Three pairs of electrons are shared in a

• Single bond
• Double bond
• Triple bond

A covalent bond is

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

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

• A
• B
• C
• D

Tags

NGSS.HS-PS1-2

How many electrons can be used in the Lewis Structure for : NO₃ -

• 23
• 20
• 18
• 24

What is the correct structure for BF₃?

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons are available for bonding in the sulfate ion (SO₄^-2)?

• 30 electrons
• 32 electrons
• 28 electrons
• impossible to tell

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