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Periodic Table

Periodic Table Arranges all of the known elements in order of increasing atomic # (# of protons)
Metals Becomes solid at room temperature (except mercury), ductile, malleable, conductor, high density, high melting point
Reactivity Those metals at the bottom left corner of the periodic table are the most reactive, changes across to periodic table
Non-Metals Dull, poor conductor, brittle, low density, low melting point, less reactive than metals
Metalloids Elements on both sides of the zigzag line (staircase) have properties of both metals & nonmetals
Periods Rows numbered from 1-7, Atomic # increases left-right, those in the same period have the same # of energy levels, chemical properties are not all similar
Groups Aka families are the columns numbered 1-18, same # of valence electrons, chemical properties are very similar, group 1 (most reactive) & group 18 (most inert, aka stable)
Chemical Reaction The ability of atoms to combine or separate w/ others to create substances, valence electrons are key to this
Stable Atom Outer shell filled, don't want to bond w/ other atoms (inert)
Alkali Metals Highly reactive, always combined, very soft
Alkaline Earth Metals Always combined, not as reactive as Alkaline metals, important minerals for our body
Transition Metals Less reactive, hard, useful building materials, jewelry, & coins, useful as oxides to make paint & pigments
Nobel Gases Nonreactive, always found alone, used in balloons, light bulbs & neon signs
Created by: ambrrr