What element can you always count on to make things light?

Category: Science · Difficulty: easy

Hint: Think about the lightest element in the periodic table.

Answer

Hydrogen

Explanation

Hydrogen is the lightest element, and it is crucial in making water and many compounds, but the play on 'light' refers to both weight and brightness.

This is an easy science riddle — a good one for children and beginners. The answer is Hydrogen.

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