What is the Atomic Mass of Calcium?

Atomic Mass of Calcium is .

A) 40

B) 39

C) 42

D) 41

Answer: The atomic mass of Calcium is 40u. Therefore, the correct option is A.

Explanation:

Atomic Mass of any substance is the sum of the number of protons and the number of neutrons in the nucleus of that atom.

For Calcium,

Number of Protons =  20
Number of Neutrons = 20

Thus,

Atomic Mass of Calcium = 20 + 20 = 40

In absolute terms, the average atomic mass of Calcium is 40.078 amu. It is calculated taking into account all the isotopes of Calcium.

There are six naturally occurring isotopes of Calcium they are,

• ⁴⁰Ca
• ⁴²Ca
• ⁴³Ca
• ⁴⁴Ca
• ⁴⁶Ca
• ⁴⁸Ca