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Periodic Properties And Variation Of Properties Physical And Chemical — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryPeriodic Properties And Variation Of Properties Physical And Chemical1 Mark
Question
A, B, C are three elements in which B is an inert gas other than helium.With this information complete the following table.
ElementAtomic numberNo. of electrons in the valence shellGroup to which the element belongs
AZ - 1
BZ
CZ + 1
Also, explain the following : Electron affinity of B is Zero.
✓

Answer

Element Atomic numberNo. of electrons in the valence shellGroup to which the element belongs
AZ - 1
BZ
CZ + 111
Since B is a noble gas element so its electron affinity is zero as its octet is complete.

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