chapter 6 and 7 test review

Element Symbol

Abbreviation of a chemical element - Ag= argentum

Metals

lustrous, malleable, and ductile, conduct heat and electricity

Non-Metals

Usually a gas or dull-powdery solid, do not conduct heat or electricity

Metalloids

Have both metal and non-metal properties

Groups of The Periodic Table

Organizes elements into periods (rows) and groups (columns)

Isotopes

Atoms with the same amount of protons but different number of neutrons

Mass Number, Atomic Number, Atomic Mass

key concepts in determining the composition of an atom

Molecular element

Two or more atoms of the same or different elements that are chemically joined

Chemical Formula

Notation indicating the type and number of atoms in a pure substance

Molecular Compounds

Molecules consisting of atoms of different elements

Ionic Compounds

Formed when metal and non-metal atoms combine to create ions

Cations and Anions

Positively and negatively charged ions formed by metals and non-metals

Atoms Combining

Process where atoms gain, lose, or share electrons to become stable

Covalent Bond

Bond formed when two nonmetals share electrons to create a molecule.