Periodic Table blocks and periodic trendsEdexcel International A Level Chemistry: Mind map

Exam questions on Periodic Table blocks and periodic trends

1. A student is sorting elements of the first four periods into the s, p and d blocks of the Periodic Table.
   Explain what is meant by the term periodic property and give one example.2 marks
2. Melting and boiling temperatures vary across Period 2. Lithium melts at 181 °C and beryllium at 1287 °C. Carbon, as diamond, sublimes above 3500 °C. Nitrogen boils at −196 °C, oxygen at −183 °C, fluorine at −188 °C and neon at −246 °C.
   Explain why the melting temperature of beryllium is much higher than that of lithium.2 marks
3. A student plots log₁₀ of the successive ionisation energies of magnesium against the number of electrons removed. The successive ionisation energies of magnesium are, in kJ mol⁻¹: 738, 1451, 7733, 10 543, 13 630, 17 995, 21 703, 25 656, 31 642, 35 462, 169 988 and 189 368.
   Calculate log₁₀ of the first three ionisation energies of magnesium, to two decimal places, and state one reason why logarithms are used.3 marks