Covalent bonding Flashcards
1
Q
A covalent bond
A
A shared pair of electrons between non -metals.
2
Q
why do covalent bonds form
A
- each atom wants to achieve a full outer shell of electrons.
- this is achieved by sharing electrons
3
Q
Why is difficult for covalent bonds to come apart?
A
The attraction of the nuclei for the shared pair of electrons is GREATER than the repulsion between the positively charged nuclei of the bonded atoms.
4
Q
Single and double covalent bonds and why they are described as LOCALISED
A
A single covalent bond ~ where atoms are bonded by a single shared pair of electrons, a single bond is formed.
Double covalent bond ~ two pairs of electrons are shared in total and a double bond forms.
LOCALISED ~ the attraction is acting solely between the shared pair of electrons and the nuclei of the two bonded atoms.
