Question

Which isotope contains has 1 prpton 1neutron and 1 electron?

Answer 1

Answer:

The more common isotope has 1 proton, 0 neutrons and 1 electron. Heavy hydrogen, also called deuterium, has 1 proton, 1 neutron, and 1 electron. The atomic number of an element is defined as the number of protons in the nucleus.