Summary Edexcel iGCSE Chemistry Revision notes on section 1

CHEMISSTIRY IREWIISSIIOIN
QUESTIONS
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nammmmmmmmmmI
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Q1 : Does the reactivity increase or decrease and Why ?


*
Al
*
:
information under 'the malogems' section

* 2
Q2 :
Which Of these would have a reaction and what will it be ? Br + Naf OR Fc +
NaBr


A2 :
(will mave a reaction :
F2 + NaBr- Brz + Nat


.




# HE HARDEN S


the halogens are group 7 in the periodic table
. The reactivity of the elements decrease as you go down the group-this is because as you go down the group ,
the molecules increase in size , therefore ,
th



electrostatic forces of attraction become weaker as it becomes more difficult for the outermost shell to gain an electron 1 + mave a full outer shell)


D ISIPLAGE IM ENT REACTIONS

I .
2
Chlorine
molecule
navide
saltem brominea ele navide
saltem


CCIB ZIC Br
#B
=


potassium
chlorine bromine
mide
+
potassiu potassium
oride
+
ride
+
>
-




WHY ?
↳ 1 . the Chlorine is more reactive than the bromine so it can displace the bromine therefore a reaction occurs ,
however ,
in 2 . no reaction occurs beca


the bromine is not reactive enough to displace the chlorine




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