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Question
Arrange the following in order of increasing ionisation energy:
Ne, He, Ar
Explain your choice.
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Solution
Ne, He, and Ar belong to group 18, and He is at the top. As ionisation energy decreases in the group, He has the highest ionisation energy.
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RELATED QUESTIONS
Choose the correct answer from the options given below:
Ionisation potential increases over a period from left to right because of the
(A) Atomic radius increases and nuclear charge increases
(B) Atomic radius decreases and nuclear charge decreases
(C) Atomic radius increases and nuclear charge decreases
(D) Atomic radius decreases and nuclear charge increases
Choose the correct answer.
An element with highest ionization potential
(i) Calesium
(ii) Fluorine
(iii) Helium
(iv) Neon
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.
Fill in the blank from the choices given below
Across a period, the ionisation potential ____________.
Choose the correct answer from the choice given:
Ionisation potential increases over a period from left to right because the
Arrange the following as per the instruction given in the bracket:
Potassium, Lithium, Sodium (increasing order of ionization potential).
Arrange the following in order of increasing ionisation energy:
F, O, Ne
Explain your choice.
Across a period, the ionization potential ______.
With reference to the variation of properties in the Periodic Table, which of the following is generally true?
