Unit 3: Vocab Practice

Front

A substance formed from a chemical reaction is a ____________

Back

Product

Front

Atom: smallest particle of an element; made of electrons, protons, and neutrons.

Back

The smallest particle of an element; made of electrons, protons, and neutrons.

Front

Atomic Mass

Back

Mass of an atom, approx. equal to the number of protons and neutrons.

Front

Electron

Back

Negatively charged subatomic particle in the electron cloud; involved in chemical bonds.

Front

Element: A pure substance made of the same type of atom.

Back

A pure substance composed of the same type of atom throughout.

Front

Groups: Columns in a periodic table that arrange elements by outermost shell electrons (also called families).

Back

Columns in a periodic table that arrange elements by outermost shell electrons.

Front

Neutron

Back

A neutrally charged subatomic particle in the nucleus; contributes to atomic mass.

Front

Periodic Table of Elements

Back

A table of known elements arranged by properties, represented by chemical symbols.

Front

Periods: Rows in a periodic table classifying elements by electron shells.

Back

Rows in a periodic table classify elements by the number of electron shells.

Front

Proton

Back

Positively charged subatomic particle in the nucleus; contributes to atomic mass.