An atom containing 25 protons, 30 neutrons and 25 electrons will have an atomic mass of:
1 answer:
Atomic mass=no of neutron+no of electron
Atomic mass=25+30
Atomic mass=55
You might be interested in
The correct answer is D) Ar
I can’t answer you but here have a meme
Answer:
i know the answer the answer is valence electrons.