What did the scientist say when he found two isotopes of helium?

Category: Wordplay · Difficulty: easy

Hint: Think about a laughing element

Answer

He discovered two.

Explanation

The answer is a pun on 'HeHe', the chemical symbol for helium, and laughter.

This is an easy wordplay riddle — a good one for children and beginners. The answer is He discovered two..

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