Atomic Number 69 — synonyms, definition

1. atomic number 69 (Noun)

2 synonyms
Tm thulium
1 definition

atomic number 69 (Noun) — A soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime.

2 types of
metal metallic element
3 parts of
apatite monazite xenotime
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