Chemistry

Gallegos

4 November, 10:59

1. * Write the name and symbol of the ion formed when

a. 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