The table shows some information about elements in Group VI. | element | electronic configuration | melting point /°C | density in g/cm³ | |---|---|---|---| | oxygen | 2,6 | -218 | 0.0013 | | sulfur | | 113 | 2.1 | | selenium | 2, 8, 18, 6 | 217 | 4.8 | | tellurium | 2, 8, 18, 18, 6 | 450 | 6.3 | | polonium | 2, 8, 18, 32, 18, 6 | 254 | |

1. (a)State the electronic configuration for sulfur.[1]
2. (b)Predict the density of polonium.[1]
3. (c)Sulfur has a boiling point of 445 °C. Predict the physical state of sulfur at 200 °C. Explain your answer. physical state explanation[1]
4. (d)(i)Oxygen exists as a diatomic molecule, O2. Draw the dot-and-cross diagram for a molecule of oxygen. Show only the outer shell electrons.[1]
5. (d)(ii)Explain, in terms of structure and bonding, why oxygen has a low melting point.[1]
6. (e)(i)Selenium, Se, is a non-metal. Deduce the formula of selenium(IV) oxide.[1]
7. (e)(ii)A small sample of selenium(IV) oxide is dissolved in water. Two drops of universal indicator are added to this aqueous solution. Predict the colour of the universal indicator in this solution. Explain your answer. colour explanation[1]
8. (f)Calculate the volume, in dm³, of 30.2g of oxygen at room temperature and pressure. Give your answer to two significant figures.[3]

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