Question

select smaller ion form each of the following pairs
a ) K+ , Li+
b)N3- , F- ​

Answer 1

Answer:

a Li+

b F-

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Answer 2

Identification of smaller ions from the given pairs.

• The general concept involved in the identification process atomic number of the element.
• The ions with less number of electrons have small size and number of electrons depends upon the atomic number.

a) $K^+, Li^+$:

• The atomic number of 'K' and 'Li' is 19 and 3. In case of $Ki^+$ and $Li^+$, the ions has 18 and 2 electrons respectively.
• As the number of electrons is less in $Li^+$ it is smaller in size.

b)$N^{3-}$, $F^-$:

• The atomic number of 'N' and 'F' is 7 and 9. In case of $N^{3-}$ and $F^-$, the ions has 4 and 8 electrons respectively.

• As the number of electrons is less in $N^{3-}$ it is smaller in size.

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