Explain how electricity is conducted through a metal. To gain full marks your answer must include a description of the structure and bonding in a metal.
Metals can be described as a lattice of close-packed positive ions in a sea of delocalised electrons. Because the electrons are delocalised, they can move freely through the metal.
AB
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All answers ▸Write ionic half-equations for the reactions at the electrodes in aluminium extraction.
Magnesium oxide contains magnesium ions (Mg2+) and oxide ions (O2–). Describe what happens when magnesium atoms react with oxygen atoms to produce magnesium oxide.
An atom of iron is represented as 56 Fe 26 Give the number of protons, neutrons and electrons in this atom of iron.
Explain the electronic configuration of Sodium (Na) and how this relates to its position in the periodic table.