Helium is an unreactive gas and neon is a gas of extremely low creativity.What,if anything, do their atoms have in common.

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Solution

Both have the valency zero means both have filled outermost shell and are in the same group. They've same chemical property, they are not react with any element. The helium has a duplet in its K shell ,while neon has an octet in its L shell.

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(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?

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