16 terms

Unit 2: Periodic Table

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Groups
The 18 vertical columns on the periodic table
Periods
The 7 horizontal rows on the periodic table
Periodic Trend
The steady change of characteristics of the elements along a row or column of the periodic table
Metals
Elements that are typically shiny, conduct heat and electricity, are malleable and ductile
Malleable
Able to be hammered or pressed out of shape without breaking
Ductile
Able to be drawn (made) into wire
Luster
Reflective. Having a surface that shines
Conductivity
How easily a substance can transfer heat and electricity
Nonmetals
Elements that are typically dull, poor conductors of heat and electricity, and are brittle
Metalloids
Elements that have some properties of both metals and nonmetals
Reactivity
The tendency of a substance to undergo a chemical change when exposed to other substances
Valence electrons
Electrons in an atom's outermost energy level that are responsible for the elements reactivity
Family
Elements within a group that have similar properties
Alkali Metals
A family of elements in group 1 that are highly reactive metals
Halogens
A family of elements in group 17 that are highly reactive nonmetals
Noble Gases
A family of elements in group 18 that are non-reactive gases