covalent bonding

what is covalent bonding

a covalent bond is when two atoms share electrons

how does electrostatic force takes place in covalent bonding

because of the negative charge of the electrons and the positive charge in the nuclei

what do simple molecular substances contain

covalent bonds

do they have high or low melting and boiling points

low

why are simple molecular substances have a low melting and boiling point

simple molecular substances have covalent bonds but they have weak intermolecular forces between the molecules, the intermolecular forces are only Brocken by melting or boiling and it requires little energy to overcome it.

why does simple molecular substances have a higher melting and boiling point of the Mr increases.

becuase stronger intermolecular forces

more electrons

molecules are larger.

more energy needing to overcome the intermolecular forces.

why do giant covalent bonds have a high boiling and melting point

becuase there are lots of strong covalent bonds between every atom I note gains covalent bond, so it high amount of energy to break these bonds. Therefore they need a high boiling and melting point to break the bonds.

what are the properties of diamond

has

what are the properties of graphite

each carbon has 3 covalent bonds

layers slide because each layer has weak forces between them

can conduct electricity because they have delocalised electricity

what is the properties of fullerene

carbon atoms are arranged in a sphere

simple molecular structure

low melting point

doesnt conduct electricity well becuase electrons cant move between molecules.