actinium-emanation

actinium emanation

noun Chemistry.
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actinon

[ak-tuh-non]
noun Chemistry.
a chemically inert, gaseous, short-lived isotope of radon that is a member of the actinium series. Symbol: An; atomic number: 86; atomic weight: 219.
Also called actinium emanation.


Origin:
1925–30; < Neo-Latin; see actinium, -on2

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actinon (ˈæktɪˌnɒn)
 
n
1.  a radioisotope of radon that is a decay product of radium. Symbol: An or 219Rn; atomic no: 86; half-life: 3.92s
2.  another name for actinide
 
[C20: New Latin, from actinium + -on]

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