Give one point of similarity and one point of difference between isotopes of ${ }_{6}^{14} C$ and ${ }_{6}^{12} C$.

(N/A) $(i)$ Similarity: Both ${ }_{6}^{14} C$ and ${ }_{6}^{12} C$ have the same atomic number,which is $6$.
$(ii)$ Difference: Both ${ }_{6}^{14} C$ and ${ }_{6}^{12} C$ have different atomic masses; ${ }_{6}^{14} C$ has a mass number of $14$,while ${ }_{6}^{12} C$ has a mass number of $12$.