Question

What is the mass number for the element? Protons: 2 Neutrons: 1 Electrons: 2
A.) 2
B.) 3
C.) 4
D.) 5

Answer 1

Answer:  The Mass Number would be equal to 3

Explanation:

The mass number of a element is the total number of protons + neutrons found in the nucleus of a single atom . Since there is 2 protons and 1 Neutron 2+1 = 3. Therefore it equals 3