Summary
Summary Unit 3.2.2. - group 2, the alkaline earth metals
- Institution
- AQA
Detailed revision notes for AQA A Level chemistry - Inorganic - 3.2.2.
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ALKALINE EARTH-
s block -
s -
sub shell full
My Ba
-
→
trends in 62 :
atomic radius nuclear charge
increases down 62 increases down 62
I, extra principal energy levels added
↳ outer e- further from nucleus
ionisation
energy
attraction nucleus & i Ngl Xtlglt
-
dneerneadens down 62 weaker force of → e
-
more principal energy levels € more
less
shielding -
required to
further from nucleus
remove e
-
SH t ISH -
kendo bexol release)
energy
melting point
dneereansens down 62
-
metallic bonds =
weaker as the size of ions increases down 62
T but number of delocalised charge All
-
size
-
same
-
e same
i
= -
distance ① metal ions & de localised -0 of El nucleus LARGER
-
-
:
sea
=
e
↳ weaker attraction break bonds
energy required
to less lower NPT
easy
=
-
. -
reaction with tho
Ngl ) s t 2h20 Cg) >
My Old t th Ig) reactivity
Ca ( OH) Is) )
Ca ( s) t
21-12061 →
,
t
Haly increases
mmmm
down 62
Sr ( s) 21-12061 Sr ( Ot Dds) Haly) T
shielding by
-
t → t
inner e
-
-
Ba ( s) t
21-12061 → Bala Dds) -
t
Haly) -
less force of attraction -
easier loss
Mglsl t IH Ill →
Mg (OHH ( ) s t
thlgl -
AR increases
Mglotthlsl
"
Mg ( agl 2 OH
-
→
t
EXTRACTION OF TITANIUM Titanium ore (ti Od
Ti
expensive strong
-
;
-
complicated extraction Tik + C t 2 Ck s
Tilly t Ah
batch process ① heated with C and a
gas
-
-
non -
corrosive ① fractional distillation :
pure till, Tilly t 1 My → Ti t
Inga ,
③ t
Ng 110009
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