A should be its ans! cz whn it have 15 electrons the configuration will be 1s2 2s2 2p6 3s2 3p3 ! so after removing 5 electrons it will acquire noble gas configuration!

The large difference between the 5th and 6th ionization energies indicates that the element in question has 15 protons in its nucleus.

Explanation:

Ionization Energy:
Ionization energy is the energy required to remove an electron from an atom or ion. It is a measure of the strength of the attraction between the electrons and the nucleus. The ionization energy generally increases as we move across a period in the periodic table, from left to right, due to the increasing nuclear charge.

5th and 6th Ionization Energies:
The 5th ionization energy refers to the energy required to remove the fifth electron from an atom or ion, while the 6th ionization energy refers to the energy required to remove the sixth electron. These ionization energies are generally much higher than the first, second, third, and fourth ionization energies because they involve removing electrons from a highly positively charged ion.

Large Difference:
The large difference between the 5th and 6th ionization energies indicates that the element in question has 15 protons in its nucleus. This is because the 5th ionization energy corresponds to the removal of the 5th electron from the atom or ion, while the 6th ionization energy corresponds to the removal of the 6th electron.

Explanation for the Number of Protons:
The atomic number of an element represents the number of protons in its nucleus. In this case, since the difference between the 5th and 6th ionization energies is large, it suggests that the element has 15 protons in its nucleus.

Element with 15 Protons:
The element with 15 protons in its nucleus is phosphorus. Phosphorus has an atomic number of 15, which means it has 15 protons in its nucleus. The large difference between the 5th and 6th ionization energies confirms the presence of 15 protons in the nucleus of the element in question.

In conclusion, the large difference between the 5th and 6th ionization energies indicates that the element being referred to has 15 protons in its nucleus, which corresponds to the element phosphorus.