Neon - one of the stable and unreactive elements of group 8.
The element sulfur (element number 16) has an orbital configuration of 1s2 2s2 2p6 3s2 3p4.
The electronic configuration of Calcium is 2-8-8-2, therefore the valency of Calcium is +2.
Beryllium would have that configuration
This electron configuration is for osmium (Os).
Sulfur
The element is Argon. Its configuration is 2 8 8.
Potassium.
The element sulfur (element number 16) has an orbital configuration of 1s2 2s2 2p6 3s2 3p4.
There is no element such as 12M. Assuming that you mean 12Mg, the electron configuration is 2, 8, 2.
[Ne] 3s2 3p5 or 2, 8, 7
The atomic number of zinc is 30. Its abbreviated electron configuration is [Ar]4s23d10 The full electron configuration is 1s22s22p63s23p64s23d10 (configurations for the atom in its ground state. Ions and excited atoms have different configurations).
This electron configuration represents Sr or Strontium. 2-8-18-7-3 represents Sr in the excited state; 2-8-18-8-2 represents Sr in the ground state.
If you think to neon this energy is 2 080 kJ/mol.
Magnesium. 2+8+2=12 electrons so it also has 12 protons., Mg has proton number 12. You can tell by looking that is is in group 2 as the outer shell has 2 electrons. It has 2 filled inner energy levels and 2 electrons in the outer shell.
2-2
Neither K2+ nor K2+ exist but even a putative configuration is impossible without knowing what one you mean.
2-8-8-2