GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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alkali metals
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alkaline earth metals
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halogens
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noble gases
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Detailed explanation-1: -halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).
Detailed explanation-2: -The word halogen means ‘salt forming’ compounds. Since all halogens have 7 electrons in their valence shell, they react rapidly with metals to form salts. Thus, the seventh group of elements is known as Halogens.
Detailed explanation-3: -Group 17 elements are collectively called halogens (In Greek: halo means salt and genes mean producing, so collectively salt producing) and it consists of fluorine, chlorine, bromine, iodine, and astatine.
Detailed explanation-4: -Group 7A (or VIIA) of the periodic table are the halogens: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). The name “halogen” means “salt former", derived from the Greek words halo-("salt") and-gen ("formation").