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Question 1: NCERT Solutions for 12th Class Physics: Chapter 13-Nuclei
(a) Two stable isotopes of lithium
and
have respective abundances of 7.5% and 92.5%. These isotopes have masses 6.01512 u and 7.01600 u respectively. Find the atomic mass of lithium.
(b) Boron has two stable isotope.s,
and
Their respective masses are 10.01294 u and 11.00931 u, and the atomic mass of boron is
10.811 u. Find the abundances of
and
Solution:
Abundance of
is 7.5% and abundance
(b) Let abundance of
x% than abundance of
will be (100 – x)%.
Check the complete chapter with solutions.
NCERT Solutions for 12th Class Physics: Chapter 13-Nuclei