Biology, 22.04.2020 19:52, kony345p

Referring to the reference periodic table, what do the elements fluorine, chlorine, and bromine have in
common?

All are located in the same period.
All have metallic properties.
All are halogens, so they are not very chemically active.
All have the same number of valence electrons.

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Referring to the reference periodic table, what do the elements fluorine, chlorine, and bromine have...