Question
Which has a higher ionization energy chlorine or magnesium why? select the best answer
Answers
GPT-4o mini
Chlorine has a higher ionization energy than magnesium.
The reason for this is that ionization energy is the energy required to remove an electron from an atom in the gas phase. Chlorine (with an atomic number of 17) is a non-metal located in Group 17 (the halogens), while magnesium (with an atomic number of 12) is a metal located in Group 2 (the alkaline earth metals).
In general, ionization energy increases across a period (from left to right on the periodic table) due to increasing nuclear charge, which holds the electrons more tightly. It decreases down a group (from top to bottom) because the outer electrons are further from the nucleus and experience increased shielding from the inner electrons.
As chlorine is further to the right in the periodic table compared to magnesium, it has a higher ionization energy due to its greater effective nuclear charge and smaller atomic radius.
The reason for this is that ionization energy is the energy required to remove an electron from an atom in the gas phase. Chlorine (with an atomic number of 17) is a non-metal located in Group 17 (the halogens), while magnesium (with an atomic number of 12) is a metal located in Group 2 (the alkaline earth metals).
In general, ionization energy increases across a period (from left to right on the periodic table) due to increasing nuclear charge, which holds the electrons more tightly. It decreases down a group (from top to bottom) because the outer electrons are further from the nucleus and experience increased shielding from the inner electrons.
As chlorine is further to the right in the periodic table compared to magnesium, it has a higher ionization energy due to its greater effective nuclear charge and smaller atomic radius.