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  • Central atom of a molecule tries to remain in:Option: 1 Maximum covalency stateOption: 2 Mi

Central atom of a molecule tries to remain in:

Option: 1

Maximum covalency state


Option: 2

Minimum covalency state


Option: 3

Both


Option: 4

None


Answers (1)

best_answer

Lewis Representation of Simple Molecules (Lewis Structure) -

Lewis Symbols of Elements

 

The number of electrons present in the outermost shell are known as valence electrons. For example, the electronic configuration of sodium (Na) is 2, 8, 1, thus, sodium has one valence electron. According to the long form of the periodic table, in the case of representative elements, the group number is equal to the number of valence electrons. The valence electrons in atoms are shown in terms of Lewis symbols. To write Lewis symbol for an element, we write down its symbol surrounded by a number of dots or crosses equal to the number of valence electrons. Paired and unpaired valence electrons are also indicated. The Lewis symbols for some of the important elements are shown below:

-

As we have learnt:
Central atom tries to remain in maximum covalency state i.e, central atom tries to make as many bonds as possible.
Maximum covalency of:
1. oxygen is 2
2. Sulphur is 6
3. Nitrogen is 5 but it makes maximum of 4 bonds
4. Phosphorus is 5
5. Carbon is 4
Hence option (1) is the appropriate answer

Posted by

rishi.raj

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