(a) लिथियम के दो स्थाई संस्थानिको `._(3)^(6)Li` एव `._(3)^(7)Li` की भूलता का प्रतिशत क्रमश: 7.5 एव 92.5 है! इन संस्थानिको के द्रव्यमान क्रमश: 6.01512 u एव 7.01600 u है! लिथियम का परमाणु द्रव्यमान ज्ञात कीजिए!
(b) बोरोन के दो स्थाई समस्थानिक `._(5)^(10)B` एव `._(5)^(11)B` है! उनके द्रव्यमान क्रमश: 10.01294u एव 11.00931 u एव बोरोन का परमाणु भार 10.811 u है! `._(5)^(10)B` एव `._(5)^(11)B` की बहुलता ज्ञात कीजिए!

Broron has two stable isotopes, ._(5)^(10)B and ._(5)^(11)B . 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 ._(5)^(10)B and ._(5)^(11)B .

(a) Two stable isotopes of lithium ""_(3)^(6)Li and ""_(3)^(7)Li 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 isotopes, ""_(5)^(10)B and ""_(5)^(11)B . 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 ""_(5)^(10)B and ""_(5)^(11)B .

(a) Two stable isotopes of lithium ""_(3)^(6)Li and ""_(3)^(7)Li 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 isotopes, ""_(5)^(10)B and ""_(5)^(11)B . 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 ""_(5)^(10)B and ""_(5)^(11)B .

Boron has two stable isotopes, "_5^10B and "_5^11B . 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 "_5^10B and "_5^11B .

Boron has two stable isotopes "_5^10B and "_5^11B . There respective masses are 10.01294 u and 11.00931 u and the atomic mass of boron is 10.811 u. Find the abundances of "_5^10B and "_5^11B .