# Periodic Table and Simple Ionic Compounds

1. Complete the following Table:
 Symbol Atomic Number Mass Number Number of Protons Number of Neutrons Number of Electrons Net Charge $$\mathrm{^{34}_{16}Se^{2-}}$$ 23 51 20 20 20 2+
1. Would you expect each of the following atoms to gain or lose electrons when forming ions? What ion is the most likely in each case?
1. K
2. F
3. Ca

1. Fill in the following table:
 Name Symbol Group Period Metal, nonmetal or metalloid? Transition metal or main group? sodium Fe O
1. Give the formulas for the ionic compounds made of the following ions:
1. Sc3+ and Br¯
2. K+ and O2¯
3. Ca2+ and I¯
4. Cr3+ and S2¯
5. Rb+ and F¯
6. magnesium (Mg) and oxygen (O) ions
7. potassium (K) and nitrogen (N) ions
8. strontium (Sr) and fluorine (F) ions
9. aluminum (Al) and sulfur (S) ions