Question

The number 40 in the name calcium-40 represents

A. the atomic number

B. the number of protons in the atom

C. the sum of the protons and neutrons

D. none of these

Answer 1

a) the atomic number

Answer 2

A. the atomic number

Step-by-step explanation:

It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth.