Match the valence electrons with the elements K, P, Ar, B, CI, Si (3.0 marks) Valence...

Match the valence electrons with the elements K, P, Ar, B, CI, Si (3.0 marks) Valence electrons 4 Element (b) Calculate the oxidation number Sulphur in (NH4),SO4 Nitrogen in Nitric acid

Expert Solution

(a) Since above all the element belongs to s and p block elements.So you can determine the valence electrons by filling the atomic number in different shell theory given by bohr's like K shell,L shell,M shell,etc. This filling of electrons take place by satisfying duplet and octet rule.

For example Atomic number of Pottasium is 19 so the electrons will be filled like this- Kshell-2,L shell-8,M shell-8,N shell-1. So the last shell is N shell and it consists of 1 electron.Therefore valence electron in Pottasium is 1.

Similarly Phosphorous atomic number 15.So, 2,8,5 i.e. 5 valence electrons.

Argon-atomic number 18.So 2,8,8.That is 8 valence electrons.

Boron-atomic number 5. So 2,3 i.e. 3 valence electrons

Chlorine-atomic number 17. So, 2,8,7 i.e. 7 valence electrons

SILICON-atomic number 14.So ,2,8,4 ie. 4 valence elctrons.Hence,it is the correct answer.

(b)

Amanda K answered 5 months ago

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