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Question
Represent ionisation potential in the form of an equation. In which unit it is measured?
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Solution
\[\ce{M(g) + I.E. -> M+(g) +e-}\]
M can be any element.
It is measured in electron volts per atom. Its S.I unit is kilojoule per mole (KJ mole−1).
RELATED QUESTIONS
What do you understand by successive ionization energies?
Arrange the elements of second and third period in increasing order of ionization energy.
Which element from the following has the highest ionization energy?
Explain your choice.
Ne, He, Ar
Li, K, Na, H (In the decreasing order of their ionization potential)
Among the elements of the second period, Li to Ne, pick out the element with highest first ionization energy
A, B, C are three elements in which B is an inert gas other than helium.With this information complete the following table.
| Element | Atomic number | No. of electrons in the valence shell | Group to which the element belongs |
| A | Z - 1 | ||
| B | Z | ||
| C | Z + 1 |
Also, explain the following : Ionization energy of element C is less than that of element A.
State whether the ionization potential increases or decreases on going down a group.
Give reason for the following:
Ionisation potential decreases down a group.
Arrange the following as per instruction given in the bracket.
Li, K, Na, H (decreasing order of their potential ionisation)
Ionisation Potential values depend on atomic size. Explain.
