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Unit B-2

state of matter one of the forms that matter takes on
solid firm in shape, not liquid
liquid flowing freely but of constant volume. a consistency like water
gas an airlike fluid substance that expands freely to fill any space available
atom the basic unit of a chemical element
proton a subatomic particle, with a positive charge
neutron a subatomic particle, with a negative charge
nucleus the central or middle where the protons and neutrons are located
electron a stable subatomic particle with a charge of negative electricity
electron cloud an informal term in physics, is used to describe where electrons are when they go around the nucleus of an atom
valence electron an electron in one of the outer shells of an atom that can participate in forming chemical bonds with other atoms
Periodic Table of Elements is a tabular arrangement of the chemical elements
reactivity he state or power of being reactive or the degree to which a thing is reactive
atomic number the number of protons in the nucleus of an atom
mass number the total number of protons and neutrons in a nucleus
atomic mass the mass of an atom of a chemical element expressed in atomic mass units
element a part or aspect of something abstract, especially one that is essential or characteristic
Created by: cpowalski85