Unit 3 Chemistry

The number at right or bottom of the element cube representing the average number of protons & neutrons.

• Atomic Number 
• Atomic Mass
• Number of Protons
• Number of Electrons

The number at top or left in the element cube that tells how many protons are found in the nucleus of one atom of the element.

• Atomic Number
• Atomic Mass
• Number of Protons
• Number of Electrons

A characteristic of a substance that becomes known during a chemical reaction that depends on the arrangement of the atoms in the molecule.

• Chemical Property
• Atomic Mass
• Reactivity
• Atomic Number

The changes that happen in substances as the atoms rearrange themselves.

• Chemical Property
• Chemical Reaction
• Reactants
• Products

Substance made up of two or more different elements that are chemically combined.

• Molecule
• Compound
• Mixture
• None of These

A particle that is orbiting the nucleus of an atom and has a negative charge; its mass is almost 0 (0.0005 amu)

• Proton
• Neutron
• Electron
• All of These

Substance made up of only one type of atom.

• Compound
• Element
• Mixture
• Molecule

One square of the Periodic Table containing the element's name, symbol, atomic number, and atomic mass.

• Element Cube
• Family
• Group
• Period

The columns (vertical) on the Periodic Table of Elements. Each family of elements have the same number of valence electrons creating the same reactivity. There are 18 families.

• Group/Family
• Period
• Noble Gases
• Metals

A classification of elements where elements have properties similar to both metals and nonmetals. Metalloids are located along the dark zigzag line on the Periodic Table of elements.

• Metals
• Non-metals
• Metalloids
• All of These