Carnallite is the mineral of
Na
Ca
Mg
C
Carnallite is a mineral, a hydrated potassium magnesium chloride with formula KMgCl3.6(H2O). So carnallite is the mineral of Mg.
The atomic numbers of the elements Na, Mg, K and Ca are 11, 12, 19 and 20 respectively. The element having the largest atomic radius is :
(a) Mg (b) Na (c) K (d) Ca