Vocab Set #3: Unit 2 Chemistry 1

Electrons on the outermost energy level of an atom.

• Electron Cloud

• Atomic Number

• Neutron

• Valence Electron

A combination of two or more atoms of the SAME type.

• Compound

• Atom

• Molecule

• Electron

Anything that has mass and takes up space.

• Matter

• Volume

• Mass

• Atom

How readily a substance combines chemically or reacts with other substances.

• Solute

• Density

• Reactivity

• Chemical Change

Area around the nucleus of an atom where the atom's electrons are found

• Atomic Number

• Proton

• Neutron

• Electron Cloud

Negatively charged particle that surrounds the nucleus of an atom.

• Electron

• Atom

• Proton

• Neutron

elements and/or compounds that when put together are unable to react chemically.

• Neutron

• Exothermic

• Proton

• Inert

A symbol assigned to an element based on the name of the element, consisting of one capital letter or a capital letter followed by a lowercase letter.

• Elemental Symbol

• Atomic Mass

• Chemical Change

• Atomic Number

A substance made up of atoms of two or more different elements joined by chemical bonds.

• Homogeneous Mixture

• Mixture

• Compound

• Molecule

The number of protons in the nucleus of an atom. Distinguishes between different types of atoms.

• Atomic Number

• Electron

• Mass

• Atomic Mass