Trend in Melting point going down group 1 elements
Going down group 1 the period number increases. This means the number of shells increases, leading to a decrease in electrostatic attraction between the positive nucleus and outer most electrons. This weaker bond means less energy is require to melt the alkali metals. Hence lowering the melting point.
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Related Chemistry GCSE answers
All answers ▸Describe dynamic equilibrium with reference to a process you have been learning in class.
Describe how to find the concentration of an alkali using an acid of a known concentration.
What is the difference between a weak and strong acid?
What determines rate of reaction?