Topic 2 Covelant Bondign Flashcards
What are covalent bonds between
Between non metals
What are covalent bonds
The sharing of electrons
Why are covalent bonds very strong
The positively charged nuclei of the bonded atoms are attracted to the shared pair of electrons by electrostatic forces
What electrons can atoms share
The ones in there outer shell
What do elements covalently bonded together aim for
A full outer shell to become stable
Where does covalent bonding happen
Compounds of non metal elements
What 3 ways can covalent bonds be drawn
Dot and cross diagram that overlap to show shared electrons
Displayed formula shows the covalent bonds as single lines between the atoms
3-D model
Why are dot and cross diagrams useful for covalent bonding
Showing with atoms the electrons in a covalent bond have come from
Why are dot and cross diagrams not useful
Don’t show the relative sizes of the atoms or how the atoms have been arranged 
Why is displayed formula useful
Shows how atoms are connected in large molecules
Why is the displayed formula not useful
Don’t show a 3-D structure of the molecule or which atoms the electrons in a covalent bond have come from
Why is the 3d model useful
Shows the arrangement
Why are 3-D models not useful
Quickly get confusing for large molecules where there are lots of atoms to include
They don’t show where the electrons in the bonds have come from
