Question

Using the periodic table entry below, how many neutrons does the most common isotope of hydrogen have?

Answer 1

zero...................................zero

Answer 2

Hydrogen is a gas and the first element listed on the periodic table.Elemental hydrogen has three naturally occurring isotopes they are namely protium, deuterium and tritium. Protium is the most common isotope with an occurrence of 99.98 percent. This isotope consists of one proton and one electron.