Complete the following table relating to the atomic structure of some elements.

$\begin{array}{cccccc}\text{Element}& \text{Atomic}& \text{Mass}& \text{Number of}& \text{Number of}& \text{Number of}\\ \text{Symbol}& \text{Number}& \text{Number}& \text{Neutrons}& \text{Electrons}& \text{Protons}\\ Li& 3& 6& & & \\ Cl& 17& & 20& & \\ Na& & & 12& & 11\\ Al& & 27& & & 13\\ S& & 32& 16& & \end{array}$

Element symbol	Atomic Number	Mass number	Number of Neutrons	Number of Electrons	Number of Protons
Li	3	6	3	3	3
Cl	17	37	20	17	17
Na	11	23	12	11	11
Al	13	27	14	13	13
S	16	32	16	16	16