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Formula Sheets
/ Chemistry
Chapter 22
p Block Elements (Group 15, 16, 17 and 18)
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Group 15
Group 16
Group 17
Group 18
Group 15
hydride basicity: NH
3
>
PH
3
>
AsH
3
;
bond angle falls down the group
oxoacids of P: H
3
PO
2
(
monobasic
)
,
H
3
PO
3
(
dibasic
)
,
H
3
PO
4
(
tribasic
)
Group 16
acid strength of hydrides: H
2
O
<
H
2
S
<
H
2
Se
<
H
2
Te
Contact process
2
SO
2
+
O
2
V
2
O
5
2
SO
3
Group 17
oxidising power: F
2
>
Cl
2
>
Br
2
>
I
2
;
acid strength: HI
>
HBr
>
HCl
>
HF
bond energy: Cl
2
>
Br
2
>
F
2
>
I
2
Oxoacid strength
HClO
4
>
HClO
3
>
HClO
2
>
HClO
Group 18
XeF
2
linear
;
XeF
4
square planar
;
XeF
6
distorted octahedral
;
XeO
3
pyramidal
General Principles and Processes of Isolation of Metals
d and f Block Elements