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The amount of energy required to remove an electron increases from left to right. This means that the atoms are able to hold on to their valence electrons more and more tightly. Thus, it gets harder to remove an electron as the atomic number increases.

Going down a group, the element doesn't change much. However, the size of the atom increases greatly, and because of this, so does the distance between the nucleus and the valence electrons. That decreases the magnitude of the force of attraction between the nucleus and the outermost electrons. Thus, IE decreases going down a group from top to bottom.

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16y ago
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8mo ago

The energy required to remove an electron from an atom (ionization energy) changes based on factors such as the atomic structure, number of electron shells, and the attraction between the electron and nucleus. As you move across a period in the Periodic Table, the ionization energy generally increases due to increased nuclear charge. As you move down a group, the ionization energy generally decreases due to increased distance from the nucleus.

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11y ago

Noble gases have completely filled orbitals / energy levels. They generally have 8 valence electrons (helium has only 2) and have stable electronic configuration. The electrons are not lost easily and hence a large amount of energy is required (high ionization energy) to remove an electron.

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14y ago

The farther out from the nucleus the easier it is to pull outer electrons. Shielding has something to do with it, but that is college chemistry. Ask your teacher about electron shielding.

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11y ago

That's ionization energy. The trend is: left to right across a period, it increases; and top to bottom down a group, it decreases.

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Q: Why does energy required to remove an electron change?
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The energy required to remove an electron from a neutral atom is the atom's?

The energy required to remove an electron from a neutral atom is the atom's ionization energy. It represents the amount of energy needed to remove the most loosely bound electron from an atom in its gaseous state.


Define ionization energy of an element?

Ionization energy is the amount of energy required to remove one electron from a neutral atom in the gaseous state. It is a measure of how tightly the electron is held by the nucleus of the atom. Elements with higher ionization energies require more energy to remove an electron and are less likely to form ions.


What energy is required to remove an electron from an atom?

The energy needed to remove an electron from an atom (in the gaseous state) is called the IONIZATION ENERGY.


What is the energy required to overcome the attraction of protons in the nucleus and remove an electron from a gaseous atom?

The energy required to remove an electron from a gaseous atom is called the ionization energy. This energy depends on factors such as the atomic structure and the strength of the attraction between the nucleus and the electron. The higher the attraction, the higher the ionization energy needed to remove the electron.


What do you call the energy involved when an atom loses an electron?

The energy involved when an atom loses an electron is called ionization energy. This energy is required to remove an electron from an atom, resulting in the formation of a positively charged ion.


What is the energy required to remove an electron from an atom in gaseous state called?

ionization energy


Is ionization energy required to add an electron to a netural atom?

Yes, ionization energy is the energy required to remove an electron from a neutral atom. When an electron is added to a neutral atom, it is called electron affinity.


What best describes what the ionization of an element is?

The energy required to remove an electron


What is first ionization enegy?

The first ionization energy is the energy required to remove the outermost (most loosely held) electron from a neutral atom in its gaseous state. It is a measure of how strongly an atom holds onto its electrons, with higher ionization energies indicating a stronger hold.


What do we mean by the first second and third ionization energies for a particular atom?

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.


What is the energy required to remove an electron from an atom in the gaseous?

The ionization energy, expressed in kJ/mol.


What do we mean by the first second third ionization energies for a particular atom?

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.