How many neutrons do the elemants have?

Answer 1

There are too many elements to list how many nuetrons each one has, but as a general rule of thumb you can subtract the atomic number (number of protons) from the molecular mass number (Which is generally the number of protons and nuetrons added, since electrons weigh very little) to obtain the number of nuetrons

For example, Carbon has an Atomic Mass of 12. Subtract the atomic number, which is 6, and you will get the number of nuetrons, which is also 6.