1.
Any substance that can't be decomposed into simpler substances by ordinary chemical processes
2.
A column in the periodic table of the chemical elements
3.
A column of elements on the periodic table
4.
Combined mass of all protons, neutrons and electrons that make up an atom
5.
The number of protons in the nucleus of an atom
6.
A chemical element that exhibits some metal and some nonmetal properties
7.
The organized array of all chemical elements in order of increasing atomic number
8.
Members of a family of an element with the same number of protons but a different number of electrons
9.
Smallest unit into which matter can be divided without the release of electrically charged particles
10.
Postitvely charged particle that resides within an atomic nucleus
11.
Subatomic particle with a mass of 1 and a charge of 0
12.
Stable negatively charged component of an atom
13.
The electrons in the outermost shell, or energy level, of an atom
14.
Structural model of an atom
