Valence Electrons and Oxidation #

How many valence electrons are in an atom of Se?

• 2
• 8
• 6
• 5

How many valence electrons are in an atom of Ba?

• 2
• 8
• 4
• 1

How many valence electrons are in an atom of Ar?

• 2
• 8
• 4
• 1

How many valence electrons are in an atom of In?

• 3
• 8
• 4
• 1

How many valence electrons are in an atom of Sn?

• 3
• 8
• 4
• 1

What is the oxidation number for Flourine (F)?

• +1 
• -1
• 17
• 7

What is the oxidation number for Be? 

• +1
• +2
• +3
• +4

What is the charge for an ion in group 1?

• +1
• -7
• -1
• +7

What is the charge of an ion in group 2?

• +2
• -6
• -2
• +6

Cations are

• positive
• negative
• on the right side of the periodi table.
• nonmetals