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Molecule

The smallest part of any compound that retains all the properties of that compound

Atom

The smallest part of an element that retains all the properties of that element

Valence Electron

The electrons found in the outermost energy level that determines that probability of bonding with other atoms.

Ionic Bonding

Two atoms combine together by ne atom transferring an electron away and the other takes an additional electron.

Bohr Diagram

These diagrams show number of protons and neutrons in the nucleus as well as all of the energy levels with their electrons.

Pure Substance

A Substance made of only one kind of particle having definite properties and definite chemical composition.

Compound

A pure substance that contains two or more elements

Lewis dot structure

These diagrams only show the chemical symbol and the valence electrons

Element

The simplest type of pure substance

Protons

The positively charged particle found in the nucleus

Nucleus

The center of an atom that is made up of protons and neutrons

Covalent bond

Two or more atoms that combine by sharing valence electrons

Electron

Negatively charged subatomic particles in an atom that are found orbiting the nucleus

Chemical bond

usually results in the formations of compounds or molecules

Neutron

Neutrally charged particles that make up the nucleus