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1a).  Give the electronic configuration of Calcium in terms of s,p, and d orbitals if applicable.

Calcium has 20 electrons, so the configuration is as follows

1s², 2s², 2p⁶, 3s² , 3p⁶ , 4s²

If you add up all the red numbers then they should add up to 20. 

1b).  Show the arrangement of the electrons in boxes.

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

1c).  Show the electrons in boxes arrangement of a Ca²⁺ ion.

A calcium atom must lose two electrons to become an ion.  It loses the outer 4s² electrons, so its configuration is as follows...

1s², 2s², 2p⁶, 3s² , 3p⁶ 

2a).  Give the electronic configuration of iron.

Iron has 26 electrons, so the electronic configuration is the same as that for calcium but the rest of the electrons go into the 3d orbital. 

1s², 2s², 2p⁶, 3s² , 3p⁶ , 4s² , 3d⁶

1s²           2s²                   2p⁶                    3s²                   3p⁶           

2b)  Show the arrangement of the electrons in boxes.

1s²             2s²                  2p⁶          3s²                  3p⁶                 4s²                   3d⁶

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