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4 marksAtomic Structure and the Periodic Table

CAPE Chemistry Unit 1 · May/June 2019 · Paper 2 · Question 1(a)(iv)

Figure 1 shows the wavelengths of prominent lines in the visible region of the atomic hydrogen spectrum.

In Figure 2, draw the electron transitions occurring between energy levels associated with the origin of the lines in the visible region of the hydrogen spectrum.

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Other parts of this question

  1. 1(a)(i)Explain how the atomic emission spectrum of hydrogen is produced.[3 marks]
  2. 1(a)(ii)Identify the series of lines in Figure 1.[1 mark]
  3. 1(a)(iii)Assess how the series of lines in Figure 1 provides evidence for discrete energy levels in hydrogen.[4 marks]
  4. 1(b)(i)Write the electronic configuration of oxygen in its ground state using s, p notation.[1 mark]
  5. 1(b)(ii)Draw the shapes of the s and p orbitals.[2 marks]
  6. 1(b)(iii)Use the VSEPR theory to deduce the arrangement of the orbitals and the shape or bond angles around each of the oxygen atom in a molecule of water (H2O) and the…[4 marks]
  7. 1(b)(iv)Explain why the density of ice is lower than expected.[3 marks]
  8. 1(c)Using the bond energies from Table 1, determine the enthalpy of reaction, ΔH_r.[3 marks]
  9. 1(d)Outline an experiment to determine the heat of solution of ammonium nitrate, including a labelled diagram of the apparatus, data to be collected, and how the…[5 marks]

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