Rank the following elements according to their ionization energy.element ionization energychlorine gallium selenium sulfur

To rank the elements according to their ionization energy, we first need to know the ionization energies of each element. Ionization energy is the energy required to remove an electron from a gaseous atom or ion.

The ionization energies of the elements you mentioned are as follows:

• Chlorine (Cl): 1251.2 kJ/mol
• Gallium (Ga): 578.8 kJ/mol
• Selenium (Se): 941 kJ/mol
• Sulfur (S): 999.6 kJ/mol

Now, we can rank these elements from highest to lowest ionization energy:

1. Chlorine (Cl): 1251.2 kJ/mol
2. Sulfur (S): 999.6 kJ/mol
3. Selenium (Se): 941 kJ/mol
4. Gallium (Ga): 578.8 kJ/mol

So, Chlorine has the highest ionization energy and Gallium has the lowest among the elements listed.