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JAMB - Chemistry (1993 - No. 5)
An element, E, has the electronic configuration 1s
2
2s
2
2p
6
3s
2
p
3
. The reaction of E with a halogen X can give?
EX
3
and EX
5
EX
3
only
EX
5
only
EX
2
and EX
3
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