Unit 1: 7th L 4-10 Vocabulary

The basic particle from which all elements are made

The average mass of all the isotopes of an element.

• Atomic Mass

• Atomic Number

• Atom

• Boiling Point

The number of protons in the nucleus of an atom

• Atom

• Atomic Mass

• Boiling Point

• Atomic Number

The temperature at which a liquid boils.

A change in which one or more substances combine or break apart to form a new substance.

• Physical Change

• Chemical Equation

• Chemical Change

• Chemical Symbol

A short way to show a chemical reaction, using symbols

• Chemical Equation

• Chemical Change

• Chemical Symbol

• Chemical Formula

Symbols that show the elements in a compound and the ratio of atoms

• Isotope

• Chemical Formula

• Chemical Symbol

• Compund

A one-or two letter representation of an element

A number in front of a chemical formula in an equation

• Coefficient

• Compound

• Density

• Chemical equation

A substance made of 2 or more elements chemically combined in a specific ratio or proportion.

• Electron

• Coefficient

• Density

• Compound