Question

Consider a neutral atom with 20 protons and 22 neutrons. The mass number of this atom is- and the atomic number is -A 22; 42B) 42; 20C)20; 4222; 20

Answer 1

B) 42; 20

Step-by-step explanation

Atomic mass = number of protons + number of neutrons

Atomic mass = 20 + 22 = 42

Atomic number - The number of protons in an atom of an element is its atomic number

Therefore atomic number is 20