alleryWhat is the valency of an element with electronic configuration 2, 8, 6?
A6
B4
C2
D8
Answer & Solution
Correct answer: C. 2
1. The configuration shows 6 valence electrons in the outer shell.
2. The element belongs to Group 16 of the periodic table.
3. For groups 13 to 18, valency equals 8 minus number of valence electrons.
4. So valency = 8 − 6 = 2.
5. The element gains two electrons to complete its octet.
6. Hence its valency is 2.
_Source: Selina Concise Chemistry ICSE Class 10, Ch 1 'Periodic Table' (aplustopper.com extract)_
Keep practising Periodic Table & Periodic Properties
Browse all Periodic Table & Periodic Properties questions for Andhra Pradesh SSC (Class 10), or explore more Chemistry topics.
Related questions
In an electrovalent (ionic) compound MgCl2, magnesium and chlorine ions exist as:Which is the BEST example of a metallic bond?Why are giant covalent crystals (like diamond) very hard?Which property of water is due to hydrogen bonding?Which molecule features hydrogen bonding?CO2 has polar bonds yet is non-polar overall because:The shape of an ammonia (NH3) molecule is:Why is the structure of methane tetrahedral?