What is Oxidation state of 1s2 2s2 2p6 3s23p4?

Answer 1

This element has 2+2+6+2+1 = 13 electrons, thus it is element with atomic number 13, Aluminium (Al).

Answer 2

The oxidation state can be calculated by assuming that all electrons in a covalent bond are shared by the more electronegative atom. In this case, the electron configuration 1s2 2s2 2p6 3s2 3p4 corresponds to sulfur (S). Since sulfur has 6 valence electrons in the 3s and 3p orbitals, there are 2 more electrons than needed for a full octet (8 electrons). This results in an oxidation state of -2.

Answer 3

That is sulfur. 6 ( +/- 2, 4 )