Semester 1 Physical Science Review

smallest unit of matter

positively charged particle

subatomic particle with a neutral charge

The number on the periodic table for each element that shows how many protons and electrons it contains.

The number of outermost electrons in the atomic structure.

An organized diagram of all the elements.

A negatively charged subatomic particle.

Two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons and therefore different mass numbers.

The total number of protons and neutrons of each element.

The center of an atom that contains protons and neutrons, also where the majority of the mass of an atom is contained.