1.

Which of the following is/are correct order?

Answer»

ATOMIC rdius `F lt O lt F^(-) lt O^(2-)`
2ND ionisation energy `C lt N lt F lt O`
Electron affinity: `I lt Br lt F lt Cl`
`Z_(ef f)` (effective nuclear change): `Al lt Al^(+) lt Al^(3+) lt Al^(2+)`

Solution :(a) The RADIUS of isoelectronic SPECIES `prop(1)/(""_(e)^(z)"ratio")`
(b) Ionisation energy `prop(1)/("size")prop`Effective nuclear charge
(c) Normally the electron afinity `(E_(A)) prop(1)/("Size of atom")`


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