Question

Why does k have a larger atomic radius than na

Answer 1

The atomic radius of K is larger than that of Na because K has a larger effective nuclear charge, which attracts electrons more strongly and results in a smaller atomic radius.

Step-by-step explanation:

Cations are always smaller than the neutral atom and anions are always larger. The sodium cation (Na+) has a smaller atomic radius than the potassium cation (K+). This is because potassium has a larger effective nuclear charge (more protons in the nucleus) compared to sodium, which attracts the electrons more strongly and leads to a smaller atomic radius.

Answer 2

The atomic radius of K is larger than that of Na because K has a larger effective nuclear charge, which attracts electrons more strongly and results in a smaller atomic radius.

Step-by-step explanation:

Cations are always smaller than the neutral atom and anions are always larger. The sodium cation (Na+) has a smaller atomic radius than the potassium cation (K+). This is because potassium has a larger effective nuclear charge (more protons in the nucleus) compared to sodium, which attracts the electrons more strongly and leads to a smaller atomic radius.