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The fewer numbers of valence electrons, and the farther away those valence electrons are from the nucleus, the lower the ionization energy will be. So your group 1 and 2 metals toward the bottom of those groups will have low ionization energies, and therefore be very reactive.

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Q: What contributes to low ionization energy for an atom?
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Related questions

Does Rb have a high ionization energy or low ionization energy?

Low


Does potassium have a high or low ionization energy?

Potassium has a low ionization energy.


Atom with low ionization energy give up their outer valence electron with ease?

The ionization energy tells us about the energy required (and thus the ease) with which an atom/ion can give away an electron (in the outermost shell). So, atoms with low ionization energies ( lowest for Caesium) give away the electron with ease


Why The bigger the atom have low ionization energy?

it is bigger..so it has more electron in orbit than smaller atom...so it keep simple


Does Kr have high ionization energy or low ionization energy?

high


How would a atom react with a low ionization energy?

It would not take a great deal of electronegativity to pull at least the first electron off this atom.


Do nonmetals have a low first ionization energy?

No. Nonmetals have a high first ionization energy.


Is Aluminum low ionization energy?

The ionization energy of aluminium is 5,985 77 eV. It is a medium energy.


Does sodium have a low or high ionization energy?

low


What is positive ionization?

a process where in positive ions are formed. Here, the electrons orbiting the outer-most shell of an atom are knocked out, resulting in the atom having more protons than electrons. This creates a positive ion.


Do the elements form anion have high or loe ionization energy?

low ionization energy


Why do very high electronegativity and very low ionization energy attracted each other?

It is because an atom with low ionization energy would loose an electron easily and the high electronegative atom has the tendency to attract electrons. The high electronegative atom would easily be able to get the electron from such an atom which has very low ionization energy. This is the case with Alkali metals and and Halogens. Alkali metals are highly electropositive and have low ionization energy and hence loose electrons very easily whereas Halogens are highly electronegative and have the tendency to attract electrons towards themselves.