The three naturally-occurring isotopes of hydrogen. The fact that each isotope has one proton makes them all variants of hydrogen: the identity of the isotope is ...
Jul 2, 2015
Elements are defined by the number of protons in an atom's nucleus. For example, an atom with 6 protons must be carbon, and an atom with 92 protons must be ...
Basic definition of some chemistry terms,
Kids learn about the science of
Atoms in a chemical element that have different numbers of neutrons than
protons and electrons are called