Answer to Question #322847 in General Chemistry for Kkm

Question

Using the average atomic masses for each of the following elements, calculate the mass (in amu) of each of the following samples.

1. 128 carbon atoms
2. Mass = amu
3.  potassium atoms
4. Mass = amu
5.  of lithium atoms
6. Mass =  amu

Answer 1

For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit (amu). By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atom.