Standard 6.4
Atoms and Molecules

The student will investigate and understand that all matter is made up of atoms. Key concepts include
a) atoms are made up of electrons, protons, and neutrons;
b) atoms of any element are alike but are different from atoms of other elements;
c) elements may be represented by chemical symbols;
d) two or more atoms may be chemically combined;
e) compounds may be represented by chemical formulas;
f) chemical equations can be used to model chemical changes; and
g) a limited number of elements comprise the largest portion of the solid Earth, living matter, the oceans, and the atmosphere.

The Typical Atom - Protons, Neutrons, Electrons

Elements

Compounds

Chemical Equations show Chemical Reactions