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__________ are what a material or substance is like and how it behaves.
Potassium is at the top of the __________ series.
Oxygen is an element on the ________ table.
Gold is very heavy, its _______ is high.
Fluorine, chlorine, bromine and iodine are all ________ in group 7 of the periodic table.
______ metals are soft and can be cut with a knife.
When a reactive element pushes out a less reactive one, this is called ____________.
Group 0 are the _____ gases.