Vocabulary#6

Element: a pure substance. 100%

Compound: a chemical combination of two or more elements.

Atom: the smallest of an element.

Proton: a particle with a positive charge in the nucleus of an atom.

Electron: a particle with a negative charge moving around the nucleus of an atom.

Neutron: an uncharged particle in the nucleus of an atom.

Nucleus: the dense center part of an atom.

Molecule: a group of more than one atom joined toguether that acts like a single particle.