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Atomic structure and the periodic table

Part of Chemistry (Single Science)

  • Atomic structure and the periodic table

    • The atom

      Atoms contain protons, neutrons and electrons. The electrons are arranged in shells around the nucleus.

    • The periodic table

      The periodic table is a chart of all the elements arranged in increasing atomic number.

    • Group 1 alkali metals

      The Group 1 elements, also known as the alkali metals, all react vigorously with water to produce an alkaline solution.

    • Group 7 halogens

      The Group 7 elements are also known as the halogens. The three common Group 7 elements are chlorine, bromine and iodine. The word ‘halogen’ means 'salt former'.

    • Group 0 and testing ions

      Flame tests identify alkali metal ions in compounds. The noble gases are very unreactive.

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