Incorrect order of radius is :-A P¯3 > S–2 > K+ B Ni > Cu > Zn C H+ < H < H– D Li < Na < K

The correct order of atomic radii is determined by the number of protons in the nucleus (atomic number) and the number of electron shells around the nucleus.

A. P¯3 > S–2 > K+ This order is incorrect. The correct order should be K+ < S-2 < P-3. This is because as we move from left to right across a period in the periodic table, the atomic radius decreases. This is due to an increase in the positive charge of the nucleus, which pulls the electrons closer.

B. Ni > Cu > Zn This order is incorrect. The correct order should be Zn > Cu > Ni. This is because as we move from left to right across a period in the periodic table, the atomic radius decreases.

C. H+ < H < H– This order is correct. An ion with a negative charge (H-) has a larger radius than a neutral atom (H), which in turn has a larger radius than an ion with a positive charge (H+). This is because the negatively charged ion has more electrons, which increases the size of the electron cloud around the nucleus.

D. Li < Na < K This order is correct. As we move down a group in the periodic table, the atomic radius increases. This is due to the addition of electron shells around the nucleus.