]]>
LearnNext
Get a free home demo of LearnNext

Available for CBSE, ICSE and State Board syllabus.
Call our LearnNext Expert on 1800 419 1234 (tollfree)
OR submit details below for a call back

clear

Covalent Bond - I

25,208 Views
Have a doubt? Clear it now.
live_help Have a doubt, Ask our Expert Ask Now
format_list_bulleted Take this Lesson Test Start Test

Covalent Bond - I - Lesson Summary

The bond formed by the mutual sharing of electrons between the combining atoms of the same or of different elements is called a covalent bond.

During covalent bond formation, each atom tries to attain octet, that is, (8 electrons) in its valence shell or duplet (two electrons) in the first shell.

Covalent bond present between two similar atoms is called as non-polar covalent bond.

Ex: H₂, N₂, O₂, Cl₂…etc

Covalent bond present between two dissimilar atoms is called polar covalent bond. In these compounds there exists charge separation.

Ex: HCl, H₂O, NH₃…etc

In the case of poly atomic ions the net charge present on them, called as formal charge. The formal charge present on the atom calculated using the formula.

Formal charge = (number of valence electrons) - [(number of unshared electrons) + ½ (number of shared electrons)]

Ex: Formal charge present on Carbonate ion (CO₃⁻²)

Formal charge on Carbon = (4) -[0+ ½(8)] = 6 - 6

= 0

Formal charge on single bonded oxygen atom = (6) -[(6) +½(2)]

= 6 - 7

= -1

Formal charge on double bonded oxygen atom = (6) -[(4) +½(4)]

= 6 - 6

= 0

Comments(0)

Feel the LearnNext Experience on App

Download app, watch sample animated video lessons and get a free trial.

Desktop Download Now
Tablet
Mobile
Try LearnNext at home

Get a free home demo. Book an appointment now!

GET DEMO AT HOME