Chemistry class poster, perhaps (13 letters) — Crossword Helper

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The Clue

Chemistry class poster, perhaps (13 letter answer)

The Answer

PERIODICTABLE

Tags

arrangement based begin chemistry clas decoration furniture law mendeleev occasional perhap periodictable place poster science

Notes

The answer PERIODICTABLE is rarely seen, appearing only about once every 2400 puzzles.

Related Clues

Occasional furniture?
It begins with H
Science class decoration
Arrangement based on Mendeleev's law
Place for I, O or U