How to say atomic number 69 ?

Atomic number 69

[əˈtɑmɪk ˈnʌmbər 69]

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What is the definition of atomic number 69 ?

  1. 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
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