Enter a clue or pattern or both:

The Clue

Its atomic number is 83 (7 letter answer)

The Answer

BISMUTH

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Notes

The answer BISMUTH is so rare that it appears less than once every 2500 puzzles.

Related Clues

Metallic element

Definition

BISMUTH as a noun:

1. (bismuth, Bi, atomic number 83) = a heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metals