Answer:
12 is the total number of outer electrons for a molecule of [tex]H_2C=CH_2[/tex]
Explanation:
Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.
In the Lewis-dot structure the valance electrons are shown by 'dot'.
Valence electron of carbon = 4
Valence electron of hydrogen = 1
Number of carbon atoms in [tex]H_2C=CH_2[/tex] = 2
Number of hydrogen atoms in [tex]H_2C=CH_2[/tex] = 4
Total number of valence electrons :
[tex]2\times 4+4\times 1 =12[/tex]
