A. Mg atom has less number of neutrons than Al.
B. Al3+ has a higher nuclear charge than Mg2+
C. their electronegativities are different
D. Al has a lower ionisation potential than Mg atom
Observe the following statements :<br>I. The physical and chemical properties of elements are periodic functions of their electronic configuration.<br>II. Electronegativity of fluorine is less than the electronegativity of chlorine.<br>III. Electropositive nature decreases from top to bottom in a group.<br>The correct answer is :