Valence Electrons
Valence electrons are the outer most electrons. These are the electrons that are used in
bonding and in chemical reactions. The number of valence is the same for all the
elements in the same column.
Column 1A 1 valence electron The first symbol in the column is H
Column 2A 2 valence electrons The first symbol in the column is Be
Column 3A 3 valence electrons The first symbol in the column is B
Column 4A 4 valence electrons The first symbol in the column is C
Column 5A 5 valence electrons The first symbol in the column is N
Column 6A 6 valence electrons The first symbol in the column is O
Column 7A 7 valence electrons The first symbol in the column is F
Column 8A 8 valence electrons The first symbol in the column is He,
however He is an exception and it
only has 2 electrons
Determine how many valence electrons are in the following elements
1. Fluorine 7 11. Lithium 1
2. Phosphorous 5 12. Zinc 2
3. Calcium 2 13. Carbon 4
4. Nitrogen 5 14. Iodine 7
5. Iron 2 15. Oxygen 6
6. Argon 8 16. Barium 2
7. Potassium 1 17. Aluminum 3
8. Helium 2 18. Hydrogen 1
9. Magnesium 2 19. Xenon 8
10. Sulfur 6 20. Copper 2
