Which ion has the lowest radius from the following ions a na...

Transcript

00:01 So we have given options n a positive m g2 positive al 3 positive s i .i 4 positive so now let me write the atomic numbers also 11 atomic number is for sodium 12 is for magnesium 13 is for aluminium and 14 is for silicon so now when i have this positive charge okay so this positive charge means that one of the electron has been moved to excited state okay so now if i write the electronic configuration so that is 1s2 2s 2p 6 similarly for md two electrons have been moved to excited state so now the electronic configuration is 1s2 2 s2 2p 6 okay after removing one electron the electrons left are 10 for 10 electrons the electronic configuration is this one for n a similarly for magnesium 2 electrons are being moved to higher energy state so that's why 10 electrons are left here also and that's why the electronic configuration is this one for magnesium and similarly for aluminum three electrons are moved to excited state so now 10 electrons are left here also so the electronic configuration is 1s2 2s2 2p6 and the same goes with silicon its electronic configuration is also 1s 2 2 s2 2p6 4 electrons are moved to higher excited state okay so you can see that these all are iso electronic species and they have similar electronic configuration okay so now they or these all are iso electronic species having same number of electrons but they belong to same period and also the charge is increasing right so for anna we have plus one charge for magnesium we have plus two charge for aluminum we have plus three charge for silicon we have plus four charge we can also find out the z upon e ratio so z is here the atomic number e is the number of electrons we have so for such as sodium, okay, so sodium has atomic number 11, electrons are 10, so this will be 0 .1.

04:05 Similarly, for magnesium, we have atomic number 12, z values 12, and electrons are 10, so this is 0 .2...

Question

Which ion has the lowest radius from the following ions A. Na^ + B. Mg^2 + C. Al^3 + D. Si^4 +

Question

Which ion has the lowest radius from the following ions A. Na^ + B. Mg^2 + C. Al^3 + D. Si^4 +

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