Hydrogen selenium Ozone
Selenic acid it is not. It is missing an ion. According to a PDF document, it is used in synthetic sodium componds.
The chemical name is hydrogen selenite.
Al(HSeO3)3
The Se (selenium) would be sp3d hybridized.
The conjugate base of H2CO3 is HCO3-. Nope, itsHSO3-
The correct formula is H2Se. Because it is an acid, hydrogen needs to be at the beginning. Hydrogen has an ionization of +1 and selenium (from which you get selenic) has -2, so you'll need 2 atoms of hydrogen (H) to balance out 1 atom of selenium (Se). So you'll have H2Se.