Covalent bonding

Question 1

what is a covalent bond

Answer 1

A covalent bond is the strong electrostatic attraction formed between a shared pair of electrons and the nuclei of the bonded atoms.

Question 2

what is average bond enthalpy value?

Answer 2

The strength of a covalent bond depends on how much energy is needed to break the bond.

We measure this bond strength using a value called average bond enthalpy, expressed in units of kJ mol-1.

Question 3

For a dative covalent bond to form between two atoms, the following requirements must be met:

Answer 3

-One atom must have a lone pair of electrons to donate.
-The other atom must be electron deficient, (i.e., it must have an incomplete electron shell).
This type of bonding is represented by an arrow showing the direction of electron donation from the atom with the lone pair to the electron-deficient atom.