Periodic Table Flashcards

Front

Matter

Back

Anything that has mass and takes up space.

Front

Atom

Back

Smallest particle of an element; basic unit of matter.

Front

Element

Back

A substance that cannot be broken down into simpler substances; it is made of only one type of atom.

Front

Nucleus

Back

Center of an atom

Front

Proton

Back

A subatomic particle that has a positive charge and is found in the nucleus of an atom.

Front

Neutron

Back

A subatomic particle that has no charge and is found in the nucleus of an atom.

Front

Electron

Back

A subatomic particle that has a negative charge.

Front

Energy level

Back

A region of an atom where electrons with the same energy are likely to be found.

Front

Periodic Table

Back

A chart of the elements showing the repeating patterns of their properties.

Front

Subscript

Back

A number written slightly below and to the right of a chemical symbol that shows how many atoms of an element are in a compound.