8CMU: Vocab

Front

matter

Back

Anything that has mass and takes up space

Front

element

Back

A substance that cannot be broken down into simpler substances and retain the same properties

Front

periodic table of elements

Back

A table that classifies elements by their physical and chemical properties; rows are called periods; columns are called groups

Front

atomic number

Back

The number of protons in the nucleus of an atom

Front

atomic mass

Back

The number of protons and neutrons in an atom

Front

group

Back

A column on the periodic table

Front

period

Back

Horizontal row of elements in the periodic table

Front

physical property

Back

A quality or condition of a substance that can be observed or measured without changing the substance's composition

Front

chemical property

Back

A property of matter that describes a substance's ability to participate in chemical reactions

Front

atom

Back

Smallest unit of an element