2 neutrons
How many neutons in Berryllium?
10
22
A silver atom has 47 protons and 61 neutrons.
the atomic number of hafnium is 72, protons? 72, neutrons? 106, electrons? 72
For each isotope the number of neutrons is different.Number of neutrons = Mass number of an No isotope - 102
9.1818 neutons
Sulfur is a non metal element. Mass number of it is 32.
91.72% of all iron has 30 neutrons. But there are also stable forms of iron with 31 and 32 neutrons.
the nucleus
Helium has one kind of atom: helium.
Helium has 2 electrons.