4.11 Use the periodic table and predict the number of electrons that will be lost or gained by the following elements as they change into simple ions. Write an equation using elemental symbols, ionic symbols, and electrons to represent each change
a. Ca
Lose 2 – Ca → Ca2+ + 2e-
b. Aluminum
Lose 3 – Al → Al3+ + 3e-
c. Fluorine
Add 1: F + e- → F-
d. Element number 34 (Selenium)
Add 2: Se + 2e → Se2-