Chemistry - PERIODIC TABLE Question with Solution | TestHub

ChemistryPERIODIC TABLEIonisation Energy,Medium2 minQB

ChemistryMediuminteger

How many pairs are, in which first species has lower ionisation energy than second species :

(I) N and O

(II) Br and K

(III) Be and B

(IV) I and $I^{-}$

(V) Li and $Li^{+}$

(VI) O and S

(VII) Ba and Sr

Answer:

Solution:

Concepts: Ionization energy trends (periodic table, exceptions), cation vs. neutral atom.

Pairs (II) Br and K, (III) Be and B have lower first ionization energy. So, 2 pairs.

Stream:JEESubject:ChemistryTopic:PERIODIC TABLESubtopic:Ionisation Energy,

⏱ 2mℹ️ Source: QB

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