The configuration ${\text{1s}}^{\text{2}}{\text{\hspace{0.17em}2s}}^{\text{2}}{\text{\hspace{0.17em}2p}}^{\text{6}}{\text{\hspace{0.17em}3s}}^{\text{2}}{\text{\hspace{0.17em}3p}}^4$ represents

Electronic configuration $1{\text{s}}^{2}2{\text{s}}^{2}2{\text{p}}^{6}3{\text{s}}^{2}3{\text{p}}^4$ indicates Sulphur. Because total no. of electrons is equal to 16. Therefore, atomic number of element $Z=16$.