In the given graph,a periodic property (R) is plotted against atomic number(Z) of the elements.Which property is shown in the graph and how it is correlated with reactivity of the elements?

Options

A. Ionisation enthalpy in a group,reactivity decreases from a`to`e.
B. Ionisation enthalpy in a group,reactivity increases
C. Atomic radius in a group reactivity deacreases from a `to` e.
D. Metalliv character in a group,reactivity increases from a `to` e.

Answer

B

Explanation

I.E. in a group decreases and reactivity increases.