Two isotopes of Boron are found in the nature with atomic weight 10.01(l) and 11.01 (II)…
Chemistry · JEE Main · NTA Exams — Some Basic Concepts in Chemistry
Two isotopes of Boron are found in the nature with atomic weight 10.01(l) and 11.01 (II). The atomic weight of natural Boron is 10.81. The percentage of (I) and (II) isotopes in it are respectively:
- 20 and 80
- 10 and 75
- 30 and 70
- 10 and 90
Answer
(A) 20 and 80
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