1.
Scientific study of the properties and behavior of matter
2.
Anything that takes up space and has mass
3.
A substance that can't be broken down by non-nuclear reactions
4.
symbol A code to identify specific elements in the Periodic Table of Element
5.
Smallest particle of an element that displays the properties of the element
6.
Positive subatomic particle located in the nucleus and assigned one atomic mass unit
7.
Neutral subatomic particle located in the nucleus and assigned one atomic mass unit
8.
negative subatomic particle moving about in an energy level around the nucleus of an atom
9.
mass of an atom equal to the number of protons plus the number of neutrons within the nucleus
10.
number of protons within the nucleus of an atom
11.
one of two or more species of atoms of a chemical element with the same atomic number and positions in the Periodic Table
12.
the mass of an atom of a chemical element expressed in atomic mass units
13.
the outermost shell of any atom
14.
the observation that an atom is most stable when it's outer shell is complete and contains eight electrons
