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Question
Which element from the following has the highest ionization energy?
Explain your choice.
Ne, He, Ar
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Solution
He
Ionisation energy decreases with an increase in the atomic size, i.e. it decreases as one moves down a group. Ne, He and Ar are inert gases. He - Period 1, Ne - Period 2 and Ar - Period 3.
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
Give a reason for the following:
Ionisation potential increases across a period, from left to right.
Represent ionisation potential in the form of an equation. In which unit it is measured?
Arrange the elements of second and third period in increasing order of ionization energy.
Name the periodic property which relates to the amount of energy required to remove an electron from an isolated gaseous atom.
Which element from the following has the highest ionization energy?
Explain your choice.
F, O, Ne
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.
Fill in the blank from the choice given in bracket.
The energy required to remove on electron from a natural isolated gaseous atom and convert it into a positively charged gaseous ion is called ____________
The changes in the properties of elements on moving from left to right across a period of the Periodic Table. For the property, choose the correct answer.
The ionization potential:
The element with highest ionisation potential is ______.
