List the energy levels for the orbital configuration of vanadium (v) atomic number 23.

n=1,2,3,4

Explanation:

The electronic configuration of vandanium is

1s2 2s2 2p6 3s2 3p6 3d3 4s2

There are two electrons in n=1, eight electrons in n=2, eleven electrons in n=3 and two electrons in n=4

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-