Common Isotopes of Carbon are 12C (6 neutrons), 13C (7 neutrons), and 14C (8 neutrons).
the mass number
How many neutons in Berryllium?
For each isotope the number of neutrons is different.Number of neutrons = Mass number of an No isotope - 102
Isotopes
Sulfur is a non metal element. Mass number of it is 32.
the atomic number of hafnium is 72, protons? 72, neutrons? 106, electrons? 72
Subtract the mass from the number. Hydrogen's mass is just about 1, and it's obviously number 1 on the Table. Therefore, its nucleus has no neutrons.
22
10
2 neutrons
9.1818 neutons
I think its Neutons