Bromine has two naturally occurring isotopes (Br-79 and Br-81) and an atomic mass of 79.904 amu.
(a) If the natural abundance of Br-79 is 50.69%, what is the natural abundance of Br-81?
(b) If the mass of Br-81 is 80.9163 amu, what is the mass of Br-79?
Here, we are going to calculate the number of protons and neutrons in Carbon-14
When atoms have same atomic number but different mass number are called isotopes. Isotopes can be symbolized by using the following notation.Where, X is the chemical symbol
A is the mass number = Number of protons + number of neutrons
Z is the atomic number = Number of protons present in the nucleus of that atom.
Carbon-14 is one of the isotope of Carbon
Carbon has atomic number Z = 6
Thus, number of protons of Carbon atom = 6
The mass number of carbon C-14 = 14
Mass number of an atom (A) = Number of protons present in the nucleus (Z) + number of neutrons present in the same nucleus.
= 14-6 = 8
Carbon-14 has 6 protons and 8 neutrons in its nucleus.
The symbol for Carbon-14 is given below