The atomic number represents the identity of the element and reveals the number of protons, whereas the atomic mass reveals the number of protons and neutrons.
The atom is the fundamental unit of an element and it’s composed of the 3 subatomic particles.
Concept #1: Discussing Atomic Structure
Concept #2: Discussing Atomic Number & Atomic Mass
The number of protons gives the identity of an element. Ions arise when there is an unequal number of protons and electrons.
Example #1: Identify the unknown element.
Element X (8 protons, 8 electrons, 8 neutrons)
Element Y (35 protons, 36 electrons, 46 neutrons)
Element Z (12 protons, 10 electrons, 13 neutrons)