Boron has two stable isotopes, ${}^{10}B\left(19\%\right)$ and ${}^{11}B\left(81\%\right)$. Average atomic weight for boron in the periodic table is:

Q. Boron has two stable isotopes, ${}^{10}B\left(19\text{\%}\right)$ and ${}^{11}B\left(81\%\right)$. Calculate average atomic mass of boron in the periodic table.

Q. The percentage of two stable boron isotopes ${}_5{B}^{11}$ and ${}_5{B}^{10}$ is, given that average atomic mass of boron is 10.81amu.

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. Boron has two isotopes, ${}^{10}B$ and ${}^{11}B$ whose relative abundances are $20$% and $80$% respectively. Atomic weight of boron is:

Q. Average atomic weight of boron is $10.10$ and boron exists in two isotopic forms $B^{10}$ and $B^{11}$. The percentage abundance of $B^{10}$ is?