Problem: Carbon has two naturally occurring isotopes: C-12 (natural abundance is 98.93%; mass is 12.0000 amu) and C-13 (natural abundance is 1.07%; mass is 13.0034 amu).Without doing any calculations, determine which mass is closest to the atomic mass of carbon.

FREE Expert Solution

We're asked to determine which mass is closest to the atomic mass of carbon without doing any calculations.


We know that carbon has two naturally occurring isotopes

  • C-12 (natural abundance is 98.93%; mass is 12.0000 amu) and 
  • C-13 (natural abundance is 1.07%; mass is 13.0034 amu).


To do so, we will compare the mass of each isotope to the atomic mass of Carbon


89% (273 ratings)
View Complete Written Solution
Problem Details

Carbon has two naturally occurring isotopes: C-12 (natural abundance is 98.93%; mass is 12.0000 amu) and C-13 (natural abundance is 1.07%; mass is 13.0034 amu).

Without doing any calculations, determine which mass is closest to the atomic mass of carbon.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Atomic Mass concept. You can view video lessons to learn Atomic Mass. Or if you need more Atomic Mass practice, you can also practice Atomic Mass practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Whitney's class at University of North Dakota.