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 Form 2 Chemistry Questions and Answers on Chemical Families

The table below gives the atomic numbers of elements of W, X, Y and Z. The letters do not represent the actual symbols of the elements.
(a) Which one of the elements is least reactive? Explain.
(b) (i) Which two elements would react most vigorously with each other?
(ii) Give the formula of the compound formed when the elements in b

 (5m 4s)
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