Describe how a chemical bond forms?

Question

Describe how a chemical bond forms?

Answer 1

In the spdf-MO model, bonds for by atoms sharing electrons to satisfy their outer shell deficiency. Thus, O has 6 e's needs 8. H has one and so 2 H's bond with 1 O and the deficiencies are addressed if not completely satisfied. The bonds formed are sigma and pi in simple organic and inorganic compounds. The  octet model gives a good first-cut indication as to the bonds needed and formed. Electrons in bonds are assumed to occupy areas in between the atoms.

Another model (MCAS), has bonding provide "back-side" protection for atoms. Thus, O has two unprotected (by an electron) regions - think of a box with two corners unprotected by an electron and the others protected. H atoms have one side unprotected. So two H's turn their unprotected back towards an unprotected regions of the O. In this way, the water molecule (HOH) is protected! For more on the MCAS model see: www.swcp.com/~jmw-mcw.