Ionisation Energy - created from Mind Map

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Ionisation

Energy needed to form positive ions

First Ionisation Energy

Second Ionisation Energy

Tips

Affected by 3 things

Successive I.E

Trend in Periodic Table

It is the loss or gain of electrons

It is the energy required to remove 1 electron from each atom in 1 mol of gaseous atoms to form 1 mol of gaseous 1+ ions.

It is the energy required to remove 1 electron from each atom in 1 mol of gaseous 1+ ions to form 1 mol of gaseous 2+ ions.

A) State the state as gaseous B) Mention (1mol of atoms) C) greater I.E easier to loose electron D) Lesser I.E harder to loose electrons

Nuclear Charge

Electron Shielding

Atomic Radius

E.g. 2nd I.E-- Na+(g) > Na2+(g) + e-

E.g. 3rd I.E-- Na2+(g) > Na3+(g) + e-

Across a Period

Down a group

Increases

Decreases