Question

atom of an element X has double the number of electrons in its L shell than its K-shell. This element forms an integral part of living organisms and non living environment
1. identify the element and write its electronic configuration
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Answer 1

• k-shell is the first shell around Nucleus of an Atom. So, the maximum number of electrons in the first shell is 2. An element becomes stable if it has only k-shell and its duet (2 electrons) are filled in it. Ex: Helium (He)

• L-shell can hold a maximum of 8 electrons. But here, It is twice the first shell. So, The number of Electrons in the second L-shell is 4.

• The Element with electronic configuration 1s², 2p⁴ is Carbon with ±4 as its valency.

Now,

• This element cannot lose 4 electrons because → Huge energy has to be supplied to break the binding force of Nucleus and pull-out its 4 electrons.

• This element cannot take 4 electrons because → Binding Force of Nucleus is not sufficient to hold-on to additional 4 electrons.

• So, This element shares its 4 electrons with other elemnts to form 'Covalent Bonds.'

• Carbon and its Compounds form a huge integral part of Organic Chemistry because These compounds are a part of living organisms and non-living environment.