Zusammenfassung der Ressource
PERIODICITY
- Atomic Radius
- Across Period
(Decreases)
- Effective nuclear
charge increases
- Down the group
(Increases)
- Increase in
quantum shell
- Ionic Radius
- Down the down
(Increases)
- Increase in
quantum shell
- Cation radius < its
atomic radius
- lose electrons; nuclear charge
is constant thus stronger
force of attraction
- Anion radius >
its atomic
radius
- gain in electrons; extent
of repulsion is greater
thus weaker force of
attraction
- Across Period
(Decreases)
- nuclear
charge
increases
- note: from Si4+ to
P3-, there's a sharp
increase due to
anions having one
more quantum shell
- Ionisation
Energy
- Write down
the
configuration
- Distance
from nucleus
- Inter-electron
repulsion
- Across Period:
Effective nuclear
charge
- Down the group:
Distance from nucleus
- Electronegativity
- Across Period:
(Increases)
- Effective
nuclear
charge
- Down the
group:
(Decreases)
- Distance from nucleus
- Melting Point
- Increases around a period until a maximum is reached
at group IV (giant molecular structure) and then
decreases across the period
- Electrical Conducitvity
- Increases through the metals and decreases through
the metalloids and non-metals