The configuration  $1{\text{s}}^{2}2{\text{s}}^{1}2{\text{p}}_x^{1}2{\text{p}}_y^{1}2{\text{p}}_z^1$  represents

Atomic number of carbon, C is $Z=6$

Ground state electronic configuration of ,C atom $\to 1{\text{s}}^{2}2{\text{s}}^{2}2{\text{p}}^2$

Excited state electronic configuration of C atom$\to 1{\text{s}}^{2}2{\text{s}}^{1}2{\text{p}}_x^{1}2{\text{p}}_y^{1}2{\text{p}}_z^1$