10 terms

Family groupings in periodic tables

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Terms in this set (...)

alkali metal
Group 1, 1 electron in outer level, very reactive, soft, silver, shiny, low density; Lithium, Sodium, Potassium, Rubidium, Cesium, Francium
alkaline earth metals
Any metal in group 2A of the periodic table
Elements in the second group on the periodic table with 2 valence electrons and are very reactive.
allotropes
Different forms of the same element
organic
A substance that contain carbon
inorganic
Not formed from living things or the remains of living things
halogens
Contains nonmetals, 7 valence electrons in it's outermost energy level. Very reactive
nobel gases
Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn) they are in group 18 and have a full outer shell of electrons making them nonreactive.
transition metals
Groups 3-12, 1-2 electrons in the outer energy level, less reactive than alsali-earth metals, shiny, good conductor of thermal energy and electrical current, high density
group
A column on the periodic table. Elements in the same group often share similar chemical properties.
period
A horizontal row of elements in the periodic table.

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