When was this clue last seen?

This clue last appeared in the NYT Mini on Tuesday, 19 December 2017.

Helium or hydrogen

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Keywords

hydrogenhelium

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This clue appeared in the NYT Mini on Tuesday, 19 December 2017. The answer GAS is a 3-letter entry.

This answer appears frequently in crosswords. View GAS answer history →

What is the answer to "Helium or hydrogen"?: GAS
How many letters is the answer to "Helium or hydrogen"?: The answer has 3 letters.
When was this clue last seen?: This clue last appeared in the NYT Mini crossword on Tuesday, 19 December 2017.
Has this crossword clue appeared before?: Yes. Variations of this clue have appeared 54 other times.

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