Question

Carbon has three isotopes: 12C, 13c 14C. The percentage abundance of these isotopes is in the ratio 98%:
1.2% : 0.8%. Calculate the relative atomic weight of carbon​

Answer 1

Answer:

Explanation:

The relative atomic mass of carbon is 12.011, which is extremely close to 12.0. This means that the masses C-13, and C-14 are practically negligible when contributing to the relative atomic mass of carbon.

In fact, the C-12 isotope makes up 98.9% of carbon atoms, C-13 makes up 1.1% of carbon atoms, and C-14 makes up just a trace of carbon atoms as they are found in nature.