Question
Question: Values of IE1, IE2 and IE3 of an element are 9.3, 18.2 and 553.8 eV. What information(s) do these da...
Values of IE1, IE2 and IE3 of an element are 9.3, 18.2 and 553.8 eV. What information(s) do these data convey?
A
The element has two electrons in the valence shell.
B
The element belongs to 14th group of Modern periodic table.
C
Both (1) and (2)
D
None of these
Answer
The element has two electrons in the valence shell.
Explanation
Solution
This can be explained by taking the example of Mg which has electronic configuration 1s2 2s2 2p6 3s2 . After removing two electron from valence shell i.e. 3s2, the third electron is to be removed from inert gas configuration. So there is big jump in Ionisation energy from IE2 to IE3 as indicated in the problem.