Calcium is a nontoxic metal that is used in supplements to maintain strong bones. under high pressure conditions, over about 320,000 atm, it has a simple cubic unit cell. how many atoms of ca are present in each unit cell?

Explanation:

It is known that in a simple cubic unit cell the atoms are only present at the corner of the unit cell. This means that there are in total 8 atoms present in a simple cubic unit cell.

Therefore, in one simple cubic unit cell sharing of one atom is only .

Hence, the total number of atoms in a unit cell will be as follows.

            = 1

Thus, we can conclude that there is 1 calcium atom present in each unit cell.

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.