Question 4 (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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Solution

The atomic number of helium is 2 and its electronic configuration is 2.
The atomic number of neon is 10 and its electronic configuration is 2, 8.
Both helium (He) and neon (Ne) have filled outermost shells. Helium has a duplet in its K shell, while neon has an octet in its L shell. Hence, helium and neon are unreactive gases.

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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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