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Noun: 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
- thulium, Tm
Type of: metal, metallic element
Nearest
atomic number 6
atomic number 60
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 7
atomic number 70
atomic number 71
atomic number 72
atomic number 73
atomic number 74
atomic number 75
atomic number 76
atomic number 77
atomic number 78
atomic number 60
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 7
atomic number 70
atomic number 71
atomic number 72
atomic number 73
atomic number 74
atomic number 75
atomic number 76
atomic number 77
atomic number 78