Summary
Summary Key principles of ionic bonding notes
- Institution
- PEARSON (PEARSON)
Describes basic terms in ionic bonding and how an ionic bond forms.
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Ionic Bonding --
-
,
I
,
bond is
-
ionic an electrostatic attraction between oppositely charged ions r
•
an . -
↳ the ions form when 2 or more atoms give 1 take electrons from each other .
1
-
y
I
-
y
'
attraction between ions in the lattice is
stronger than repulsion of same ions . -
I
,
-
I 7
,
-
- /
TRENDS
strength of bonding
size of the ion → smaller ions mean
stronger attraction
•
.
ion → of attraction
AN1 0NS and CATIONS
•
more
charged stronger force .
CATION positively charged ion .
ionic radii
( same group ) radius increases
the
down a group AN1 ON negatively charged ion
•
-
as electron shells do , and attraction to the nucleus
decreases .
Sodium and chloride ions .
period ionic radii decreases
formed by burning sodium in chlorine
•
across a
,
-
.
↳ this and nuclear
is because ions become more charged
IN all
,
charge increases attraction
, so more between them . 2 Na t CL2 →
( comparing isoelectric ions ) (5) (5)
(g)
.
↳ represent this
two ionic half equations can
Path 484614 BRAHE # HES
IN a IN at the
-
→ loses 1 electron .
-
C12 the 2cL
-
high melting point →
gains 1 electron
the giant lattice creates a network of electrostatic
t
( ) ¢ :)
forces . . "
↳
LEE Steelhead .info?heetoto9neoEEfsfitdee.tores Na ×
. . . . wa a
" " . .
→
i
brittleness .ci . u -
ionic solids crystallise when stress is applied
layers ,
, . . . .
( ) ¢ :)
. .
slide → now same charge ions next to each other "
-
,
Na ×
repel and crystals break apart CI
Na
.
ions then repel .
. .
→ ←
stress
electrical conductivity
when in solution -
Imdten
when solid the ions are not free to move and no
EVIDENCE Of IONS
,
,
delocalized electrons .
when molten the ions are now mobile ,
.
breaks down into
In
aqueous solutions , the lattice
seperate ions when the compound dissolves .
solubility
positive and negative ions are attracted to water
-
the
molten
ability
or in
to
undergo electrolysis
solution is the best
when
. evidence .
↳ hydrates ions hydration energy can overcome lattice .
energy dissolving , the compound .
Copper chromate shows us visually
with colours .
%fE.ro
⑤ chignmate
←
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