All Subjects
Light
The atomic number is the number of protons in the nucleus of an atom. It uniquely identifies an element and determines its chemical properties.
congrats on reading the definition of atomic number. now let's actually learn it.
Mass Number: The total number of protons and neutrons in an atom's nucleus.
Isotope: Atoms of the same element with different numbers of neutrons and thus different mass numbers.
Proton: A subatomic particle found in the nucleus with a positive electric charge equal in magnitude to that of an electron but opposite in sign.