Question

6. Carbon atomic number 6, mass number 12, it means carbon has *

6 proton, 6 neutron
6 proton, 12 neutron
all of these

Answer 1

All of these....

Hope it helps

Answer 2

Answer:

Carbon-12 is of particular importance in its use as the standard from which atomic masses of all nuclides are measured, thus, its atomic mass is exactly 12 daltons by definition. Carbon-12 is composed of 6 protons, 6 neutrons, and 6 electrons.

...

Carbon-12.

General

Protons 6

Neutrons 6

Nuclide data

Natural abundance 98.93