Vocab Set #5: Unit 2 Chemistry 1

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

• Catalyst
• Production
• Reactivity
• Inert

A combination of two or more atoms

• Atom
• Compound
• Particle
• Molecule

Positively charged particles found inside the nucleus.

• Atom
• Proton
• Neutron
• Electron

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

• Atomic Mass
• Atomic Number
• Atomic Symbol
• Atomic Name

The area around the nucleus of an atom where the atoms electrons are found.

• Nucleus
• Electron Cloud
• Zone of Electrons
• Atomic Cloud

The smallest particle of an element.

• Atom
• Proton
• Neutron
• Electron

Electron(s) on the outermost energy level of an atom that is responsible for the chemical properties of an atom.

• Electron Cloud
• Valence Electrons
• Outer Electrons
• Nucleic Electrons

A measure of how much matter is in an object.

• Mass
• Volume
• Density
• Weight

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

• Molecule
• Element
• Compound
• Mixture

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.

• Atomic Mass
• Atomic Name
• Atomic Number
• Atomic Symbol