Question

please tell me a atomic no with atoms

Answer 1

Explanation:

Z is the atomic number..... I think so

Answer 2

Answer: Its atomic number is 2, so it has two protons in its nucleus. Its nucleus also contains two neutrons. Since 2+2=4, we know that the mass number of the helium atom is 4.

Please mark it as brainliest answer..

Explanation: