Elements in Group 1 of the periodic table (Li, Na, K, …) are known as:
AHalogens
BNoble gases
CAlkali metals
DAlkaline earth metals
Explanation
📌 Group 1 (excluding hydrogen) = alkali metals. They are highly reactive soft metals that form +1 cations and react vigorously with water to produce hydrogen gas and a strong base. Group 2 = alkaline earth metals (Be, Mg, Ca, …). Group 17 = halogens. Group 18 = noble gases.
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