In a periodic table the average atomic mass of magnesium is given as 24.312 u. The average value is based on their relative natural abundance on earth. The three isotopes and their masses are `"_12^24Mg` (23.98504u), `"_12^25Mg` (24.98584u) and `"_12^26Mg` (25.98259u). The natural abundance of `"_12^24Mg` is 78.99% by mass. Calculate the abundances of other two isotopes.

Average atomic mass of magnesium is 24.31 amu. This magnesium is composed of 79 mole % of 24mg and remaining 21 mole % of 25mg and 25mg . Calculate mole % of 26mg .

Carbon occurs in nature in the form of two isotopes with atomic mass 12 and 13 respectively. If average atomic mass of carbon is 12.011 u , what is the % abundance of the two isotopes ?

Nitrogen occurs in nature in the form of two isotopes with atomic mass 14 and 15 respectively. If average atomic mass of nitrogen is 14.0067, what is the % abundance of the two isotopes ?

Two stable isotopes of lithium "_3^6Li 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.

The three stable isotopes of neon: "_10^20 Ne , "_10^21Ne and "_10^22Ne have respective abundances of 90.51%, 0.27% and 9.22%. The atomic masses of the three isotopes are 19.99 u, 20.99 u and 21.99 u,respectively. Obtain the average atomic mass of neon.

The relative abundance of various isotopes of silicon is as:Si-28=92.23%,Si-29=4.67% and Si-30=3.10%. Calculate the average atomic mass of silicon.

Select the correct statement(s) : a) In the reaction ._(92)^(235)U+_(0)^(1)n rarr _(56)^(140)Ba +2_(0)^(1)n +x, x is _(36)^(94)Kr b) In the reaction ._(11)^(23)Na +z rarr _(12)^(23)Mg +_(0)^(1)n, the bombarding particle z is deuteron c) Very large amount of energy is produced during nuclear fusion and nuclear fission d) In a fission reaction , a loss in mass occurs releasing a vast amount of energy