Chemistry 5070 · O Level · Atomic structure and the Periodic Table

Atomic structure and the Periodic Table — practice question

To which element does sodium belong?

  • 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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