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2011-P3-04
se the Periodic Table to answer this question.
) Give the symbol of.
0 a non-metal used to sterilise water,
an element which forms diatomic molecules,
(iii) an element which reacts with water to give an alkaline solution.
(iv) an element which forms an ion of the type X2-.
0 Oxygen, sulphur and selenium are in Group Vl of the Periodic T
oxygen is a gas and sulphur is a solid. Predict whether seleniu​

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