1.* Write the name and symbol of the ion formed whena. a sulfur atom gains two electrons.
b. an aluminum atom loses three electrons.
c. a nitrogen atom gains three electrons.
d. a calcium atom loses two electrons.
2 * Write electron configurations for the 2 + 2 plus cations of these elements.

Fe
Co
Ni
3. Write electron configurations for the 3 + 3 plus cations of these elements.

chromium
manganese
iron
4. Write the symbol for the ion formed when each element gains electrons and attains a noble-gas electron configuration.

Br
H
As
Se