The molecular formula of the fluoride of a non-transition third period element(M) is "MF_(2) .Therefore,the probable group number of the element is/are "

The group numbers of transition elements

The atomic radii of transition elements in a period are.

All elements in the third period have

Based on the group valency of elements write the molecular formula of the following compounds giving justification for each : Compound formed when an element, A of group 2 combines with an element B of group seventeen.

Based on the group valenvy of elements write the molecular formula of the following compounds giving justification for each: (i) Oxide of first group elements. (ii) Halide of the elements of group thirteen, and Compounds formed when an element, A of group 2 combines with an element, B of group seventeen.