select the correct answer. which atoms ionization energy is greater than that of phosphorus (p)? a. ba b. k…

Brief Explanations:

Ionization energy generally increases across a period and decreases down a group in the periodic table. Phosphorus (P) is in Group 15 and Period 3. Barium (Ba) is in Group 2 and Period 6, potassium (K) is in Group 1 and Period 4, both have lower ionization - energies as they are metals and in lower periods or groups. Arsenic (As) is in Group 15 and Period 4, has a lower ionization energy than P due to its larger atomic size. Chlorine (Cl) is in Group 17 and Period 3. As it is to the right of P in the same period, it has a higher effective nuclear charge and thus a higher ionization energy.

Answer:

D. Cl