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  • Which of the following element has the lowest value of IE1?Option: 1 SnOption: 2 <p

Which of the following element has the lowest value of IE1?

Option: 1

Sn


Option: 2

Si


Option: 3

Pb


Option: 4

Ge


Answers (1)

best_answer

As we learnt

 

Factors affecting I.E -

 

The shielding or screening effect reduces the force of attraction between the outer most electrons and the nucleus, hence the outermost electrons can be easily removed.

- wherein

IE\propto \frac{1}{screening\ effect}

I.E of 14th group follows the order:

C > Si > Ge > Pb > Sn

IE_{Pb}>IE_{Sn}

because of the poor shielding effect of inner electrons, Pb results in lanthanide contraction. Thus, its IE1 is higher than Sn.

Therefore, Option(1) is correct

Posted by

Rishi

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