Lewis structures

Atoms that share three pairs of electrons form a ______ covalent bond.

• single
• double
• triple

In covalent bonds, electrons are ___________.

• transferred
• gained
• lost
• shared

Tags

NGSS.HS-PS1-2

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

• 23
• 20
• 18
• 24

How many valence electrons are in Phosphorus?

• 15
• 4
• 5
• 31

Tags

NGSS.HS-PS1-1

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

• 2
• 8
• 6
• 18

Tags

NGSS.HS-PS1-1

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

• 4
• 6
• 8
• 2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Who could this molecule be?

• CH₄
• CO₂
• PCl₅
• BF₃

Tags

NGSS.MS-PS1-1

What is the correct formula for this molecule?

• Si₄F
• SiF₄
• SiF
• Si₄F₄

Tags

NGSS.MS-PS1-1

Which is the correct molecular structure for carbon dioxide?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

Which element is most likely to form a covalent bond?

• Nitrogen
• Lithium
• Sodium
• Potassium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2