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Unit B-2, Atoms

state of matter solid, liquid, gas, plasma
solid rigid structure, strong force of attraction, low particle energy
liquid medium FOA, medium PE
gas low FOA, high PE
atom The smallest element of matter that still has the properties of that element
proton positive charge, found in neucleus
neutron neutral charge, found in neucleus
neucleus center of the atom
electron negative charge, orbits the neucleus
electron cloud Where an electron could be at any given time
valence electrons outer shell electrons
Periodic Table of Elements an organization of the elements
reactivity how well it reacts with other elements
atomic number number of protons
mass number protons + neutrons
atomic mass weighted average mass of an atom of an element
element A substance with the same number of protons
Created by: akotaru20