SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Helium
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Chlorine
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Oxygen
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Neptune
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Detailed explanation-1: -The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).
Detailed explanation-2: -It is the most electronegative element, given that it is the top element in the Halogen Group, and therefore is very reactive. It is a nonmetal, and is one of the few elements that can form diatomic molecules (F2). Chlorine is a halogen in group 17 and period 3.
Detailed explanation-3: -Chlorine (Cl2) was the first halogen to be discovered in 1774, followed by iodine (I2), bromine (Br2), fluorine (F2), and astatine (At, discovered last in 1940).
Detailed explanation-4: -Chlorine is a chemical element with symbol Cl and atomic number 17. Classified as a halogen, Chlorine is a gas at room temperature.
Detailed explanation-5: -What elements are called halogens? Fluorine, Chlorine, Bromine, Iodine and Astatine are called halogens.