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Francium is very reactive, so it doesn't require a lot of energy to react/ lose an electron.It is in Group 1, and we know that all group 1 elements are very reactive because they only have one electron in the outer shell to lose and then they have a complete outer shell/stability.

It has a lot moreinter-shellelectrons that any other element in group 1, which 'blocks' the positive charge from thenucleus. So it's outer shell electrons is less attracted to thenucleusand is ready to be donated in a reaction.

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Q: How to tell that Francium has low ionization energy?
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Related questions

Which element has a low ionization energy?

Francium (Fr) has the lowest Ionization potential.


Does francium have a high or low ionization energy?

Francium has the lowest ionization energy. Think of it this way, France - Francium. France has never won a war and is considered to be weak. Francium is weak!


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

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Does potassium have a high or low ionization energy?

Potassium has a low ionization energy.


Does Kr have high ionization energy or low ionization energy?

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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


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

low ionization energy


Energy required to start chemical reaction?

Energy required for a reaction can vary. Depending on the atom it changes. The element will be more reactive if it has a low 1st ionization energy since it requires less energy to react. The most reactive element in Francium since it has the lowest 1st ionization energy level. If an element has a high electro-negativity then it will also be able to react with little energy.


Is actinium has a low ionization energy?

The value is not so low: 499 kJ/mol.


Which alkali metal is most reactive with oxygen?

Francium is an alkaline metal, which means that its one electron is easily given away, making it highly reactive. Because the atom is so large, there is a shielding effect between the protons in the nucleus, and the valence electron. This blocks the attractive forces, and the other layers of electrons work to repel the valence electron, decreasing the ionization energy even further. The low ionization energy is what makes francium so reactive, that none of it can be isolated effectively.