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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.
