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Periodic Classification Of Elements

Question 4:

(a) Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?

(b) Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common?


(a) Yes. The atoms of all the three elements lithium, sodium, and potassium hav…

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