How many neutrons in an atom?

No matter how many electrons or neutrons an atom has, the element is defined by its number of protons. The periodic table is arranged in order of increasing atomic number, so the number of protons is the element number. For hydrogen, the number of protons is 1. For zinc, the number of protons is 30. read more

How to Find the Number of Neutrons in an Atom Two Methods: Finding the Number of Neutrons in a Regular Atom Finding the Number of Neutrons in an Isotope Community Q&A Determining the number of neutrons in an atom is fairly simple and doesn’t even require any experimentation. read more

Applying the formula above, the number of neutrons will be: # number of neutrons = Mass Number - Number of Protons # number of neutrons = 23 - 11 # number of neutrons = 12. Hence, there are are 12 neutrons in an atom of sodium. read more