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1 markAtomic Structure

CSEC Chemistry · January 2009 · Paper 2 · Question 2(a)(ii)

Isotopes are common. Chlorine-35 (³⁵₁₇Cl) and carbon-12 (¹²₆C) are the most abundant isotopes of chlorine and carbon. Other isotopes are ³⁷₁₇Cl and ¹⁴₆C. Carbon-14 is radioactive.

State ONE use of carbon - 14.

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  1. 2(a)(i)Define the term 'isotopes'.[1 mark]
  2. 2(b)Write the electron configurations of ³⁷₁₇Cl and ¹⁴₆C.[2 marks]
  3. 2(c)Calculate the percentage of carbon - 14 in 1 mole of tetrachloromethane, ¹⁴₆C³⁷₁₇Cl₄.[3 marks]
  4. 2(d)Based on your knowledge of the properties of compounds and isotopes, complete Table 3 below by writing the differences between the sets of compounds, and a…[8 marks]

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