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16 Cards in this Set

  • Front
  • Back

metals

Found on the left side of table.Lose electrons to form positive ions (cations)Most are silver, shiny, solid, malleable, ductile, and goodheat/electrical conductors

nonmetals

Found on the right side of table.Gain electrons to form negative ions (anions)

metalliods

Share properties of metals and nonmetals

period

Horizontal rowsShare the same number of energy levels

group

A group/family is a vertical columnThey have similar propertiesSame # of valence electrons

atomic number

The number of protonsin an atom

atomic mass



The mass of an atom. It iscalculated by using the ratios of howoften the mass numbers (protons +neutrons) of naturally occurring isotopesof an atom are found in nature

atomic radii

Size of the atom,measured from the nucleus to the outerelectron level

metallic character

How strong thecharacteristics of a metal are present

non-metallic character



How strong the characteristics of a nonmetal are present. Increasesdiagonally up and to the right

electron affinity

A neutral atom’s likelihood of gaining an electron

ionization energy



Amount of energy an atom must absorb to discharge an electron

alkai metals

Most active metals Stored under oil 1+ oxidation number Because of their reactivity, alkali metals don’texist as free elements. All Group 1 metals react vigorously with water.

hydrogen

Unique element, most abundant in the universe(75%) Nonmetal on the left side of the Periodic Table(found in metal column) Gas state One valence electron

halogens

Most active nonmetals 1- oxidation number

noble gases

Relatively inactive (inert) Contain 8 valence electrons All gases