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Helium has the greatest ionization energy. Its electron is being removed from the principal shell closest to the nucleus. It has a greater I.E. than hydrogen does because the electron is being pulled away from a greater nuclear charge.

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7y ago
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11y ago

Group 18 as they have completely filled electronic configurations, are stable and hence do not ionize.

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6y ago

Helium has an ionisation energy of 2372.3 kJ/mol.

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11y ago

Halogens or group 17

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11y ago

All noble gases

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13y ago

Helium

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Q: Which elements has the highest ionisation energy?
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Related questions

Ionisation energy of noble gases?

noble gases have the maximum ionisation energy. helium has the highest ionisation energy


Has largerst ionization energy in its period?

Ionisation energies GENERALLY increase across a period. As a result, the noble elements (i.e. Group 0 elements) usually have the highest ionisation energies, as they are highly stable.


Name the elements with highest ionisation enthalpy?

Helium


Highest IP values in 3A group elements?

Boron has the highest ionisation potential among group IIIA elements.


What happens to the first ionisation energy of the elements as a period is crossed?

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What do you know about group 1 elements on a pieriodic table?

group 1 elements make their hydroxides are highly basic, they are the elements with least ionisation energy


Which Lewis structure represent an atom x in period 4 with the highest first ionisation energy?

. .x ..


Has the highest ionization energy in the group element?

ionisation energy order for gr 14 is c>si>ge>sn<pb


What element has the Highest ionization energy in Group 14?

ionisation energy order for gr 14 is c>si>ge>sn<pb


What is the relationship between ionization energy and the alkali metals?

There is no relation ship. They have the lowest ionization energies.


Which elements on periodic table have the highest ionization energies?

Helium (He) has the highest ionization energy.


How does the ionisation energy change down the groups in the periodic table?

Ionisation energy decreases down the group. It is easy to remove an electron.