1. Ions (Atoms with CHARGE!!!) 11 p+ 12 n 0 I’m outta here! Now what??? We have more protons than electrons. That’s weird!!!!!

2. Ions (Atoms with CHARGE!!!) 9 p+ 10 n 0 We knew we do it! Now our outer shell is complete Now what??? We have more electrons than protons. That’s weird!!!!!

3. Ions Ion – an atom that has either lost or gained an electron(s) Ion – an atom that has either lost or gained an electron(s)

4. What overall charge would an ion have if it had 15 protons and 18 electrons? 1. 0 2. +3 3. -3 4. +15 5. -15 6. +18 7. -18

5. An atom that has lost an electron would have a _________ charge. 1. positive 2. negative 3. neutral

6. Atoms with Charge Atom loses electrons Atom loses electrons * Overall positive charge *Cation Atom gains electrons Atom gains electrons * Overall negative charge * Anion

7. Example Magnesium loses 2 e - leaving it with 12 p + and 10 e - Magnesium loses 2 e - leaving it with 12 p + and 10 e -

8. What charge would Magnesium have when it becomes an ion? 1. +1 2. -1 3. +2 4. -2 5. +6 6. -6

9. Example Magnesium loses 2 e - leaving it with 12 p + and 10 e - Magnesium loses 2 e - leaving it with 12 p + and 10 e - Overall 2+ charge and Mg becomes Mg 2+ (ion) Overall 2+ charge and Mg becomes Mg 2+ (ion)

10. What charge would Sulfur have as an ion? 1. +1 2. -1 3. +2 4. -2 5. +6 6. -6

11. Example Sulfur gains 2 e - and now has 16 p+ and 18 e - Sulfur gains 2 e - and now has 16 p+ and 18 e - Overall -2 charge and is written S 2- as an ion Overall -2 charge and is written S 2- as an ion

12. Charges on atoms Use the periodic table to predict charge on an atom Use the periodic table to predict charge on an atom +1 +3 +4-3-2 +2