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periodic table

TermDefinition
alkali metals highly reactive metals, never found uncombined. Metals are soft enough to cut with a butter knife
alkaline earth metals not as reactive but still never found uncombined. they serve as important minerals for our body.
transition metals less reactive metals. useful for building materials, jewellery and coins. also used as oxides to make paint and pigments.
noble gases unreactive gases always found on their own nature. used in neon signs, balloons, and light bulbs
metalloids elements on both the zig zag line.both metals and non metals.
periods rows one through seven. atomic number increases from left to right. those in the same period have the same number of energy levels
groups most reactive and most inert. are families which are the coluoms from one to eighteen. same number of valence electrons. chemical properties are very similar.
metals shiny luster, solid at room temperature except mercury and germanium.ductile, malleble, good conductors, high density, high melting points, reactivity
non metals no luster, poor conductors, brittle, not ductile, not maleable, low density, low melting point, less reactive than metals.
periodic table arranges all of the known elements in order increasing atomic number.order generally coincides with increasing atomic mass too.
Created by: 1637201