You have the mythical element ′X′ that can exhibit variable valency 1, 2 and 5. Which of the following are not the correct chemical formulae for the compound formed by the combination of the element ′X′ with different radicals?
i. XPO4
ii. X2SO4
iii. X3ClO4
iv. X5NO3
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Answer:
The element is Nitrogen...thanks
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