The tiny, basic units of matter are called ____. Atoms are made up of 3 subatomic particles: ____ are positively charged, ____ are negatively charged, and ____ are neutral (no charge). Protons and neutrons are found inside the ____ in the center of the atom, while electrons are found moving around on the ____ of an atom. Different types of atoms have different numbers of protons, neutrons, and electrons--these 118 pure substances are called ____ and are all listed on the ____. Each element is represented by a 1- or 2-letter ____ on the Periodic Table. Atoms of different elements bond together to form ____ (sometimes called chemicals), substances that have new and unique properties.

ATOMS & ELEMENTS

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