Atomic mass is the number of ________ and ______ in an element.
protons and neutrons
Atomic mass is the number of protons and neutrons in an element.
The atomic mass of an element is the sum of the number of protons and neutrons in the nucleus of an atom. To find the atomic mass of an element, you need to know the number of protons and neutrons in the nucleus.
To determine the number of protons, you can simply look at the element's atomic number, which is usually listed on the periodic table. The atomic number represents the number of protons in an atom of that element.
To find the number of neutrons, you can subtract the atomic number (number of protons) from the atomic mass (the weighted average mass of all the isotopes of that element). The atomic mass is also usually listed on the periodic table.
So, to summarize, the atomic mass of an element is the addition of the number of protons and neutrons in an atom.