Chemical Bonding and Molecular Structure

There are two forms of bonding.

• Ionic, where an electron completely transfers to a new element.
• Covalent, where the elelectrons where shared between elements, never transfered.

Ionic compounds

- essentially complete electron transfer from an element of low IE (metal) to an element of high electron affinity (EA) (nonmetal). This is usually between metals and non metals only.

Covalent: you share the valence electrons. basically the electrons that connect each other/ or closests to each other.

Number of valence electrons is equal to the Group number.

example:

ATOM core valence

• Na 1s

Molecular structure is basically the blueprint for the molecule. It can planned out in a dot structe which is my facorite.

                             0---b------0 sorta like this but it is much more detailed.2 2s2 2p6 3s1 [Ne] 3s1

Br [Ar] 3d

10 4s2 4p5 [Ar] 3d10 4s2 4p5