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Two stable isotopes of lithium ""(3)^(6)...

Two stable isotopes of lithium `""_(3)^(6)Liand""_(3)^(7)Li` have respective abundances of 7.5% and 92.5%. These iostopes have masses 6.01512 u and 7.01600 u respectively. Find the atomic mass of lithium.

Text Solution

Verified by Experts

Atomic weight of lithium
`=(7.5xx6.01512+92.5xx7.01600)/100`
= `(45.1134+648.98)/100` = 6.94093.
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