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Periodic Families

Across
Do not form compounds easily, happy/inert elements
Many are man-made
Many are man-made
Columns of the periodic table
Not able to conduct electricity or heat very well, very brittle, do not reflect light
Semi-conductors, properties of both metals and non-metals
Down
Created the periodic table
Very reactive metals, malleable, ductile, conduct heat and electricity
Ductile and malleable, conduct electricity and heat, include iron, cobalt, and nickel
Rows of the periodic table
Salt-former, exist in all three states of matter