The sum of an element's mass number and its number of protons and neutrons is given by the formula mass number = protons + neutrons. One can simply deduct the number of protons, or atomic number, from the mass number to calculate how many neutrons an atom has. Therefore, this statement is false.
Atomic mass is the amount of matter that makes up an element's atom. It is written as a multiple of 1.992646547 1023 gramme, or one-twelfth of the mass of the carbon-12 atom, which is given an atomic mass of 12 units.
A subatomic particle is an atom's constituent particle in the physical sciences. According to the Standard Model of particle physics, a subatomic particle can either be an elementary particle, which is not made up of other particles, or a composite particle, which is made up of other particles (such as a proton, neutron, or meson).
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