Periodic table reading technique
Proton: a positively charged particle located in an atom’s nucleus.
Neutron: a particle that has no electric charge and is located in an atom’s nucleus.
Nucleus: the central region of an atom where most of the atom’s mass is found in protons and neutrons.
Electron: a negatively charged particle located outside an atom’s nucleus.
Atomic number: the number of protons in the nucleus of an atom.
Atomic mass number: the total number of protons and neutrons in an atom’s nucleus.
Isotope: atoms of the same element that have a different number of neutrons.
Ion: when an atom loses or gains electrons.
Atomic mass: the average mass of the atoms in an element.
Reactive: indicates how likely an element is to undergo a chemical change.
Metalloid: an element that has properties of both metal and nonmetal.
Radioactivity: the process by which the nucleus of an atom of an element releases energy and particles.