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In their outer electron shell, halogens have 7 valence electrons, one less than the number needed for a full shell. Therefore, it is much, much easier for the halogen to gain an electron in bonding than for it to lose 7 - the ionization energy (energy required to remove an electron from an atom) is quite high.

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Loma Schowalter

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Q: Why it is difficult to remove an electron from halogens?
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Why is it difficult to remove electron from halogens?

In their outer electron shell, halogens have 7 valence electrons, one less than the number needed for a full shell. Therefore, it is much, much easier for the halogen to gain an electron in bonding than for it to lose 7 - the ionization energy (energy required to remove an electron from an atom) is quite high.


Would it be most difficult to remove an electron from sodium aluminum sulfur or chlorine?

It would be most difficult to remove an electron from chlorine because it has the highest electron affinity among the elements mentioned. Sodium has the lowest ionization energy, meaning it's easiest to remove an electron from it.


What is the characteristics about the outer electron shells of halogens?

The outer electron shells of halogens have seven electrons, making them one electron short of a full outer shell. This makes halogens highly reactive as they tend to gain an electron to achieve a stable electron configuration. Halogens are located in Group 17 of the periodic table.


How are halogens like metals?

Halogens are not like metals. Halogens are elements missing one electron for full valency.


Would it be more difficult to remove an electron from sodium or bromine?

It would be more difficult to remove an electron from bromine than from sodium because bromine's valence electron is farther from the nucleus, experiencing weaker attraction compared to sodium's valence electron, which is closer to the nucleus.


What group achieves the electron configuration of a noble gas by gaining one electron?

All halogens have 7 valence electrons. They gain one electron and achieve noble gas electronic configuration


What is characteristic about the outer electron shells of the halogens?

The outer electron shells of the halogens typically contain seven electrons, making them highly reactive and likely to gain one electron to achieve a stable electron configuration. Additionally, halogens have a tendency to form negatively charged ions when they react with other elements by gaining one electron.


What term describes the most reactive nonmetals that have seven valence electron?

Halogens.


What does not have identical outer electron configuration?

halogens


Which element group have the most negative electron affinities?

The halogens, specifically the group 17 elements, have the most negative electron affinities. This is because they have a strong attraction for gaining an electron to achieve a stable electron configuration with a full outer shell. Fluorine has the highest electron affinity among the halogens.


What would be harder to remove an electron from sodium or chlorine?

It would be harder to remove an electron from chlorine because it has a higher electronegativity compared to sodium. This means that chlorine has a stronger pull on its electrons, making it more difficult to remove an electron.


What group of elements give off the most energy when they gain an electrons?

Group 8A, the noble gases because they have high electron affinity.