Naturally occuring lithium consists of two isotopes whose atomic weights are 6.015 u and 7.016 u. The atomic weight of natural lithium is 6.491 u. The percentage Li-6.015 u is

Q. Naturally occurring boron has two isotopes whose atomic weights are 10.01 (I) and 11.01 (II). Atomic weight of natural boron is 10.81 The percentage of isotopes (I) and (II) respectively are :

Q.

Naturally occurring chlorine consists of two isotopes whose atomic weights are 35 and 37. The atomic weight of natural chlorine is 35.5, then what is the ratio of $C{l}^{35}toC{l}^{37}$?

Q.

Naturally occurring chlorine consists of two isotopes whose atomic weights are 35 and 37. The atomic weight of natural chlorine is 35.5, then what is the ratio of $C{l}^{35}toC{l}^{37}$?

Q. Naturally occurring boron consists of two isotopes, whose atomic masses are 10.01 and 11.01. The atomic mass of natural boron is 10.81. Calculate the percentage of each isotope in natural boron.

Q. Lithium exists in nature in the form of two isotopes, $Li-6$ and $Li-7$ with atomic masses $6.0151u$ and $7.0160u$ and the percentage $8.24$ and $91.76$ respectively.
Calculate average atomic mass.