Summary notes, revision videos and past exam questions by topic for Edexcel GCSE Biology Topic 6 – Plant Structures and their Functions
Ac Al P N O S Cl F Ne Ar Rn I Si Xe He B C As 1 2 3 4 5 6 7 THE HALOGENS When Group 7 elements react, the atoms gain an electron in their outermost shell. Going down the group, the outermost shell’s electrons get further away from the attractive force of the nucleus, s...
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