Answer
The isotopes can be denoted by 2 different notations:
1. First notation : $^{A}_{Z}X$
Here, X is the chemical symbol, A is the mass number, and Z is the atomic number.
2. Second notation : $X$-$A$
This is is the chemical symbol (or chemical name X) followed by a dash and the mass number of the isotope.
Work Step by Step
Examples are denoted using the neon isotopes:
1. First notation :
$^{20}_{10}Ne$ , $^{21}_{10}Ne$, $^{22}_{10}Ne$
2. Second notation:
$Ne$-20, $Ne$-21, $Ne$-22
neon-20, neon-21, neon-22
