Symbol: A one or two-letter abbreviation used to represent the element. Atomic number: The number of protons in the nucleus of an atom of the element. These rules help in identifying and writing ...

But they and other researchers were finding that the proton did not seem to be the only particle in the nucleus. As they studied atomic disintegration, they kept seeing that the atomic number ...

This is the chemical symbol for chlorine, written with its mass number and atomic number. Calculate the number of protons, neutrons and electrons an atom of chlorine contains. Number of protons ...