Unit 3

How many valence electrons does Tin (Sn) have?

• 8

• 7

• 5

• 4

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons does Lithium (Li) have?

• 8

• 1

• 5

• 2

Tags

NGSS.HS-PS1-1

How many valence electrons does Bromine (Br) have?

• 5

• 6

• 7

• 8

Tags

NGSS.HS-PS1-1

What is a valence electron?

• an electron that is found in the outermost shell of an atom. 
• an electron found in the innermost shell of an atom.
• an electron found in the middle shell.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of these is correct?

• 
• 
• 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

This could be the dot diagram of 

• Ne
• Si
• Al
• Be

Tags

NGSS.HS-PS1-1

How many electrons should Hydrogen, group 1, have around its Lewis dot model?

• 1
• 2
• 7
• 8

Tags

NGSS.HS-PS1-1

This is a correct dot diagram for oxygen, group 16.

• true
• false

Tags

NGSS.HS-PS1-1

This is a correct dot diagram for fluorine, group 17.

• true
• false

Tags

NGSS.HS-PS1-1

This is the correct dot diagram for sodium, group 1

• true
• false

Tags

NGSS.HS-PS1-1