How to find the number of protons in an atom?

Part 1. Calculating Protons, Electrons, and Neutrons. Get a periodic table of elements. Find your element on the periodic table. Locate the element's atomic number. Determine the number of electrons. Look for the atomic mass of the element. Subtract the atomic number from the atomic mass. read more

How to Find the Number of Protons, Neutrons, and Electrons. Finding the number of protons, neutrons, and electrons in a given element isn't as hard as it sounds. read more

Find the Number of Neutrons. To find the number of neutrons in an atom, you need to find the mass number for each element. The periodic table lists the atomic weight for each element, which can be used to find mass number, For hydrogen, for example, the atomic weight is 1.008. read more