Zusammenfassung der Ressource
C2
- Structure and Bonding
- Chemical Bonding
- Elements react to form
compounds by gaining or
losing electrons, or by sharing
electrons
- Atoms of metals in group 1
combine with atoms of
non-metals in group 7 by
transferring electrons to form
ions that have the electronic
structures of noble gases
- Ionic Bonding
- Ionic compounds are
held together by strong
forces between the
oppositely charged
ions.
- the ions from a giant
structure or lattice.
the strong forces of
attraction act
throughout the lattice
- Formulae of ionic compounds
- the charges on the
ions in ionic
compounds always
cancel each other out
- the formula of an ionic
compound shows the
ratio of ions present in
the compound
- sometimes we need
brackets to show the
ratio of ions in a
compound.
- covalent bonding
- a covalent
bond is formed
when two
atoms share a
pair of
electrons
- the number of covalent
bonds depends on the
number of electrons it
needs to achieve a
stable electronic
structure.
- Metals
- the atoms in metals
are closely packed
and arranged in
regular layers
- the electrons in the highest
energy level are delocalised.
the strong electrostatic
forces between these
electrons and the positively
charged metal ions hold the
metal together
- Structure and Properties
- Giant ionic structures
- Ionic compounds have high
melting points and they are
all solids at room temperature
- Ionic compounds will
conduct electricity when
we melt them or dissolve
them in water. their ions can
then move freely and can
carry charge through the
liquid
- giant metallic structures
- simple molecules
- nanoscience
- the properties of polymers
- giant covalent structures
- How much?
- Rates and Energy
- Salts and Electrolysis