Answer :
Answer:
Halogens are the only elements present in all the three basic states of solid, liquid, and gas, wherein the state of the matter changes as we go down the list. The top two elements of fluorine and chlorine are gas, the middle one, bromine, is liquid, and the last two, iodine and astatine, are in the form of solid.
Answer:
Explanation:
Halogens are found in group 7 of the periodic table and include the elements fluorine, chlorine, bromine, iodine… they have 7 electrons on their outer shell making them very reactive and they can form strongly acidic compounds with hydrogen eg. HCl
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