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Byju's Answer
Standard IX
Chemistry
Valency to Chemical Formula
The question ...
Question

The question refers to the elements of the periodic table with atomic numbers from 3 to 18. Some of the elements are shown by letters, but letters are not the usual symbols of the elements.
Which of these :
(e) have least ionization energy?

345678910ABCDEFGH1112131415161718IJKLMNOP

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Solution

Element I with atomic number 11 represent sodium element. Sodium has a large size, so it readily loses its valence electron.

Therefore, element I has the least ionization energy.

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345678910ABCDEFGH1112131415161718IJKLMNOP
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