【 】CH2CH2 Lewis Structure ,Valence Electrons ,Formal Charge

CH2CH2 (Ethene) Lewis Structure

Answer:

In CH2CH2 Lewis Dot structure,two double bonds exist between the two carbon atoms.Besides,each carbon has two hydrogen atoms using two single bonds.In CH2CH2 Lewis Dot structure,there are totally twelve valence electrons.

Hello,today I am going to draw the CH2CH2 Lewis structure in just few steps.


CH2CH2 Lewis structure Setup Step-1:

To draw the CH2CH2 lewis structure , we have to find out the CH2CH2 valence electrons first.We express valence electrons as dots in CH2CH2 lewis dot structure.



To get the valence electrons of carbon,we need to look at the electronic configuration of carbon.



C(6)=1s²2s²2p²



The highest value of principal quantum number here is n=2.


The highest value of principal quantum number ,n , indicates the valence shell and we know the electrons in valence shell is called valence shell.




The nunber of valence electrons in carbon is 4.







Now,to draw the lewis dot structure of carbon,we need to imagine a square around carbon.





We know a square has four sides.At first,we have to place one valence electrons as dot to every side of that square before pairing up.


Again, we have to find out the valence electrons of hydrogen(H).

To get the valence electrons of hydrogen(H),we need to look at the electronic configuration of hydrogen (H).

H(1)=1s¹

The highest value of principal quantum number here is n=1.

The highest value of principal quantum number ,n , indicates the valence shell and we know the electrons in valence shell is called valence shell.




The nunber of valence electrons in hydrogen(H) is 1.



CH2CH2 Lewis structure Setup Step-2:


Now we have to count total number of CH2CH2 Valence electrons .


2×C = 4 ×2 =8

4×H=4×1= 4


So,the total number of CH2CH2 valence electrons is twelve ( 8+ 4=12) .These 12 valence electrons have two tasks at the the same time.They connect all the atoms and satisfy the duet rule of hygrogens and octet rule of two carbon atoms.




CH2CH2 Lewis structure Setup Step-3:


Now we have to determine the central atom in CH2CH2.The central atom is that kind of atom that is single or that has lower electronegativity.In case of CH2CH2,Carbon,C, is the central atom which has two atoms and H is the outer atom.Hydrogen is always considered as outer atom



CH2CH2 Lewis structure Setup Step-4:

Now we need to connect the two central atoms using single bond or line(-) or two dots【●●).


Every line represent two 【●●】dots or two valence electrons.




In the above structure,we have used 2 valence electrons.So,we have 12-2 = 10 valence electrons left.




Now we need to connect the outer atoms equally with both carbons.






So,to connect 4 hydrogen atoms ,we have used 8 valence electrons out of 10.Now we have (10 -8 =2) two valence electrons left.








Look ,both carbon atoms have 6 valence electrons here.To have the octet,we need to place two valence electrons between them.





Now both carbon has satisfied their octet and four hydrogens have satisfied their duet.This is the CH2CH2 (ethene)Lewis structure.




CH2CH2 (ethene)Lewis structure




CH2CH2 Lewis Structure:Formal Charge

To find the best Lewis structure, we have to find out the formal charge of each atom in CH2CH2 by applying the formula for formal charge.



Formula-3

Formal Charge=Valence Electrons-Dots-Lines




The formal charge of each hydrogen atom in CH2CH2 is zero and the formal charge of each carbon atom is also zero.





So,the best CH2CH2 lewis dot structure will be the one where most atoms will have zero formal charge.Here,is the best lewis dot structure for CH2CH2.

CH2CH2 Lewis Structure

●Which is the correct

 lewis structure for

 ethylene C2H4?

Answer: The correct Lewis structure for ethylene,C2H4, is given below:

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