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Chapter 5 Phy. Sci.

Vocabulary for chapter 5 Physical Science

TermDefinition
Periodic Table An arrangement of elements in columns, based on a set of properties that repeat from row to row
Period A row in the periodic table of elements
Group A column in the periodic table of elements
Periodic Law Pattern of repeating properties from group to group in the periodic table
Atomic Mass Unit (AMU) 1/12 the mass of a carbon-12 atom
Metals elements that are good conductors of current and heat, most are solid at room temp.
Transition metals elements that form a bridge between the elements on the left and right side of the periodic table
Nonmetals elements that are poor conductors of heat and electric current, mostly gases at room temp.
Metalloids elements with properties that fall between those of metals and nonmetals
Valence electron an electron that is in the highest occupied energy level of an atom
Alkali metals have a single valence electron, highly reactive
Alkaline earth metals have 2 valence electrons, harder that Alkali metals
Halogens have 7 valence electrons, highly reactive nonmetals
Noble gases have 8 valence electrons, except for helium (2), also extremely unreactive
Created by: braden.nichols
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