Review and more

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.

How many valence electrons does Bromine (Br) have?

• 5

• 6

• 7

• 8

This could be the dot diagram of 

• Ne
• Si
• Al
• Be

How many valence electrons?

• 2

• 3

• 4

• 5

How many valence electrons does Tin (Sn) have?

• 8

• 7

• 5

• 4

How many valence electrons does Lithium (Li) have?

• 8

• 1

• 5

• 2

How many valence electrons does Hydrogen Have?

• 1 Valence electron

• 2 Valence electron

• 3 Valence electron

• 4 Valence electron

• 5 Valence electron

How many valence electrons does Nitrogen Have?

• 1 Valence electron

• 2 Valence electron

• 3 Valence electron

• 4 Valence electron

• 5 Valence electron

The minimum energy particles must have to react is the

• acting energy

• active energy

• activation energy

Bond making is

• Endothermic

• Exothermic