A horizontal row on the periodic table is a _____., group, period, A vertical column on the periodic table is a _____., group, period, The period number on the periodic table corresponds to the number of _____., protons, valence electrons, energy levels, neutrons, Every element in the same group, except for the transition metals, has the same _____., set of isotopes, number of energy levels, number of protons, number of valence electrons, To be classified as a metal, an element must have the properties of ___., brittle, solidity, poor conductivity., coarseness, ductility, transparency., malleability, luster, good conductivity., A gaseous element would be classified as a ___., metal, nonmetal, metalloid, An element that is dull, not lustrous, and a poor conductor of heat and electricity would most likely classified as a ___., metal, nonmetal, metalloid.

Periodic Table Patterns_C

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