Wie man "atomic number 69" ausspricht

• "atomic number 69" ausgesprochen in Englisch.

Bedeutung und Definitionen von "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

Synonyme:

• thulium
• Tm
• atomic number 69