How many orbitals would mercury (Hg) have?

6 orbitals

Explanation:

An atom of mercury will have 6 - orbitals because it can be found on the 6-period in the periodic table of elements.

Orbitals or shells are energy levels in which electrons are placed within an atom.

Let us write the shell notation of the element:

    Hg has 80 electrons:

            K     L    M   N     O   P

            2      8   18    32    18  2

So, we have six orbitals

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.