Periodic Trends Vocab

Actinides

• 89–103; radioactive metals

• 57–71; lanthanide series

• 1–20; noble gases

• 14–20; halogens

Tags

TX.112.43.C.5.B.

Lanthanides

• 45–59; transition metals

• 57–71; rare earth metals

• 72–86; actinides

• 1–14; alkali metals

Tags

TX.112.43.C.5.B.

Cation

• charged ion; lost electrons

• neutral ion; gained electrons

• uncharged particle; no electron change

• negative ion; gained protons

Tags

TX.112.43.C.5.B.

Transition Elements

• Group 1–2; fixed valence electrons

• Group 3–12; variable valence electrons

• Group 13–18; non-variable valence electrons

• Group 1–3; variable valence electrons

Tags

TX.112.43.C.5.B.

Ionization

• of removing an electron from an atom

• of adding an electron to an atom

• of splitting an atom into smaller parts

• of converting an atom into a molecule

Tags

TX.112.43.C.5.B.

Anion

• charged ion; gained electrons

• neutral ion; lost electrons

• positively charged ion; gained protons

• negatively charged ion; lost neutrons

Tags

TX.112.43.C.5.B.

Atomic Radius

• Distance from the nucleus to the outer electron

• Distance from the nucleus to the inner electron

• Distance between two nuclei in a molecule

• Distance from the nucleus to the nearest atom

Tags

TX.112.43.C.5.B.

Periodic Law

• The physical and chemical properties of the elements are periodic functions of their atomic numbers

• The atomic mass of elements is the primary factor in determining their properties

• The properties of elements are constant and do not change with atomic number

Tags

TX.112.43.C.5.B.

Ion

• A neutral particle

• A particle with a charge; gained or lost electrons

• A particle that cannot gain or lose electrons

• A particle that is always positive

Tags

TX.112.43.C.5.B.

Main-group Elements

• Groups 1, 2, 13–18; predictable properties

• Transition Metals; variable properties

• Noble Gases; unreactive elements

• Lanthanides and Actinides; radioactive elements

Tags

TX.112.43.C.5.B.