Chemical Bonding, Structures and Properties Flashcards
ionic bonding
non-metal + metal
metallic bonding
metal + metal
covalent bonding
non-metal + non-metal
why are metals conductive?
due to the sea of delocalised electrons
define a chemical bond
a chemical bond is an electrostatic force of attraction between elements with a positive and negative charge
what is the point of chemical bonding
chemical bonding occurs for atoms to get a stable electron configuration
giant covalent
high melting point
simple covalent
low melting point (small molecules)
what is ionic bonding
an electrostatic attraction between oppositley charged ions
metals…. electrons to get a full outer shell
lose
non-metals…. electrons to get a full outer shell
gain
how are metals arranged
in a lattice
sodium has…. outer electron
1
therefore each atom releases 1 electron into the sea of electrons
Magnesium has …. outer electrons
2
therefore each atom releases 2 electron into the sea of electrons
Aluminium has… outer electrons
3
therefore each atom releases 3 electron into the sea of electrons
why do giant ionic structures conduct electricity when molten
because ions are free to move
how to drawn ionic bonding
dot and cross diagram
how to draw covalent bonding
dot and cross diagram but with overlapping orbital
what is covalent bonding
a shared pair of electrons
examples of giant covalent structures
graphite and diamond
uses of diamond
cutting things (it is hard)(high melting point)
uses of graphite
pencils + lubricant (layers slide)
how is graphite arranged
forms hexagonal layers
what element is diamond and graphite made of
carbon
