Explain how a covalent bond holds two atoms together.
The electrostatic forces of attraction between the shared pair of bonded electrons and the positively charged nuclei hold the atoms together.
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Related Chemistry GCSE answers
All answers ▸Potassium forms an ionic compound with sulfur. Describe what happens when two atoms of potassium react with one atom of sulfur. Give your answer in terms of electron transfer. Give the formulae of the ions formed. (5 marks)
Chlorine reacts with potassium bromide to form potassium chloride and bromine. In this reaction chlorine forms chloride ions: Cl2 + 2KBr --> 2KCl + Br2. Explain, using the equation, how you know that chlorine has been reduced.
Write a word equation for the reaction between lithium bromide and chlorine gas.
Explain what is meant by a saturated hydrocarbon