Question

Formula to calculate atomic mass of an atom if only proton no is given and we don't know neutron no.​

Answer 1

Answer:

Atomic number, atomic mass, and relative atomic mass

Forms of the same atom that differ only in their number of neutrons are called isotopes. Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons.

Answer 2

Atomic number, atomic mass, and relative atomic mass

Forms of the same atom that differ only in their number of neutrons are called isotopes. Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons.