Chemistry 5070 · O Level · Elements, compounds and mixtures

Elements, compounds and mixtures — practice question

Which chemical element is sodium?

  • Amelting point $1535\,^{\circ}\text{C}$; electrical conduction: good; density $7.86\,\text{g cm}^{-3}$
  • Bmelting point $1083\,^{\circ}\text{C}$; electrical conduction: good; density $8.92\,\text{g cm}^{-3}$
  • Cmelting point $113\,^{\circ}\text{C}$; electrical conduction: poor; density $2.07\,\text{g cm}^{-3}$
  • Dmelting point $98\,^{\circ}\text{C}$; electrical conduction: good; density $0.97\,\text{g cm}^{-3}$

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