Average Atomic Mass for Period 4

Potassium

- 39.10


Calcium

- 40.08


Scandium

- 44.96


Titanium

- 44.96


Vanadium

- 50.94


Chromium

- 52


Manganese

- 54.93


Iron

- 55.85


Cobalt

- 58.93


Nickel

- 58.69


Copper

- 63.55


Zinc

- 65.41


Gallium

- 69.72


Germanium

- 72.64


Arsenic

- 74.92


Selenium

- 78.96


Bromine

- 79.90


Krypton

- 83.30