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4 marksAtomic Structure

CSEC Chemistry · May/June 2012 · Paper 2 · Question 4(a)

Radioisotopes are very useful in everyday life. For example, Uranium - 235 is used in energy generation because it produces large amounts of energy when the atoms split.

State TWO other uses of radioisotopes and explain the importance of EACH.

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Other parts of this question

  1. 4(b)(i)Outline the criteria for placing elements in the Periodic Table. Hence, state the appropriate group and period for EACH of the elements P, Q, R and S.[4 marks]
  2. 4(b)(ii)Elements P and Q react together to form a compound. Deduce whether this compound is ionic or covalent. Use 'dot cross' diagrams to show the bonding in the…[4 marks]
  3. 4(b)(iii)Compare the reactivity of EACH of elements Q and S with dilute hydrochloric acid. Write a balanced equation for EITHER of these reactions with dilute…[3 marks]

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