Question

What is the mass number, symbol, and charge of an atom that contains 19 protons, 20 neutrons and 19 electrons?

Answer 1

Step-by-step explanation:

mass number = 19 + 20 = 39 (protons + neutrons)

The charge is 0. This is an atom

The symbol = K

Protons: 19

Electrons: 19

Neutrons: 20