It is because when you remove an electron during first ionization process the force of attraction between nucleus and valence electrons increases (since there will be more protons than electrons). In the second ionization it is harder to remove an electron, thus more energy is needed.
The first ionization energy is the energy required to remove the outermost electron from an atom, forming a positively charged ion. The second ionization energy is the energy required to remove the second electron, and so on. Each successive ionization energy tends to increase because it becomes increasingly difficult to remove electrons from a positively charged ion.
Cl
The second ionization energy for lithium is greater than the first because removing the second electron requires breaking a stronger bond due to the higher effective nuclear charge after the first electron is removed. This leads to a greater energy input to remove the second electron compared to the first.
Phosphorus has a higher ionization energy than sulfur because phosphorus has a smaller atomic radius and greater nuclear charge compared to sulfur. This means that the electrons in phosphorus are held more tightly by the nucleus, requiring more energy to remove an electron. Additionally, the electron configuration of phosphorus leads to greater electron repulsion, further increasing its ionization energy.
Oxygen has a greater ionization energy than lithium. This is because oxygen has a stronger nuclear charge and more electron shielding compared to lithium, making it more difficult to remove an electron from an oxygen atom.
There is a greater repulsive force from the negatively charged anion, thus causing the addition of successive electrons to be electrically unfavorable. Energy is necessary to overcome the electrostatic repulsion, making additional electron affinities endothermic. For the same reason, the noble gases and nitrogen absorb energy even for their first ionization energy. Greater stability = energy released. It requires energy to disrupt that stability.
The first ionization energy is the energy required to remove the outermost electron from an atom, forming a positively charged ion. The second ionization energy is the energy required to remove the second electron, and so on. Each successive ionization energy tends to increase because it becomes increasingly difficult to remove electrons from a positively charged ion.
Cl
The second ionization energy for lithium is greater than the first because removing the second electron requires breaking a stronger bond due to the higher effective nuclear charge after the first electron is removed. This leads to a greater energy input to remove the second electron compared to the first.
First ionization energy is the energy required to remove the first outermost electron from an atom. The second ionization energy is the energy required to remove the next available electron, and is greater than the first IE. The third IE is that energy needed to remove the third electron, and is greater the the second IE.
Phosphorus has a higher ionization energy than sulfur because phosphorus has a smaller atomic radius and greater nuclear charge compared to sulfur. This means that the electrons in phosphorus are held more tightly by the nucleus, requiring more energy to remove an electron. Additionally, the electron configuration of phosphorus leads to greater electron repulsion, further increasing its ionization energy.
In the first ionization an electron is removed from a neutral atom. In the second ionization an electron is removed from a positively charged ion. Since electrons carry a negative charge and opposite charges attract it is more difficult (i.e. takes more energy) to remove.
Oxygen has a greater ionization energy than lithium. This is because oxygen has a stronger nuclear charge and more electron shielding compared to lithium, making it more difficult to remove an electron from an oxygen atom.
Antimony has a greater ionization energy level than tellurium. Ionization energy is the energy required to remove an electron from an atom in the gaseous state. Antimony has a higher effective nuclear charge due to its smaller atomic size, resulting in a stronger attraction to its electrons compared to tellurium. This makes it more difficult to remove an electron from antimony, hence its higher ionization energy level.
Ionization energy is the energy required to remove an electron from an atom. It can provide information about an element's reactivity and ability to form ions. Lower ionization energy indicates easier removal of electrons and greater reactivity, while higher ionization energy means more energy is needed to remove electrons, indicating lower reactivity.
The second ionization energy of Group 1 elements is greater because after losing one electron, the remaining electron is held more tightly by the nucleus due to the higher effective nuclear charge, making it more difficult to remove. In contrast, the first ionization energy is lower because the outer electron is farther from the nucleus and experiences less attraction.
The first ionization energy of boron is greater than that of lithium because boron has one more proton in its nucleus than lithium, leading to a stronger attraction between the nucleus and the outer electron being removed. Additionally, boron has a smaller atomic radius than lithium, resulting in stronger electron-electron repulsions for boron, making it harder to remove an electron.