Answer the following question given this paragraph: 

Atomic Number In the 1910s, experiments with X rays led to this useful conclusion: the magnitude of the positive charge in the nucleus of every atom of a particular element is the same. In other words, all atoms of the same element have the same number of protons. Furthermore,.


Q: All atoms of the same element have the same number of what?

 Choices:

- electrons

- molecules

- charge

- protons

A:
protons
