Among the elements of the third period Na to Ar pick out the element: (a) with highest first ionisation enthalpy (b) with largest atomic radius (c) that is most reactive non-metal (d) that is most reactive metal

Among the elements of the third period Na to Ar pick out the element:

1.	Among the elements of the third period Na to Ar pick out the element: (a) with highest first ionisation enthalpy (b) with largest atomic radius (c) that is most reactive non-metal (d) that is most reactive metal
Answer» DIUM (Na)(B). Argon (Ar)(c). PHOSPHORUS (P)(d). SODIUM (Na)