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7 Which element has atoms that can form halide ions?
(1) iodine (3) strontium
(2) silver (4) xenon


Sagot :

Halide ions are, by definition, ions of the halogen elements. The only halogen among the four choices is iodine, and thus iodine is the element that can form halide ions.
It is iodine. The halogen creates halide ions and takes in electrons.