Question

4) The symbol of oxygen is 0. There are 8 protons and 8 neutrons in it's nucleus.
From this determine the atomic number (z) and atomic mass number (A) of oxygen.​

Answer 1

Answer:

Atomic number = number of protons in nucleus

So atomic number of oxygen is 8

Atomic mass = number of protons + neutrons

So atomic mass of oxygen is 8+8 = 16

Answer 2

Answer:

the atomic mass of oxygen is 16. it's atomic mass number is 8