atomic number 69

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Noun atomic number 69 has 1 sense

thulium, Tm, atomic number 69 - 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
--₁ is a kind of metallic element, metal
--₁ is a substance of apatite; monazite; xenotime

atomic number 61 atomic number 62 atomic number 63 atomic number 64 atomic number 65 atomic number 66 atomic number 67 atomic number 68 atomic number 69 atomic number 70 atomic number 71 atomic number 72 atomic number 73 atomic number 74 atomic number 75 atomic number 76 atomic number 77

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