What is meant by 'activation energy' ?
This is the MINIMUM energy required for a reaction to work or to be activated. If this energy is not reached, the reaction in full does not happy. Imagine a game of basketball. If you do not shoot the ball high enogh, it will not be able to reach the basket, and therefore you cannot win the game.
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Related Chemistry A Level answers
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A white substance is placed on the table in front of you, explain what methods/techniques you could use to determine what compound the substance is
What is a formula of Potassium Sulfate?
Calculate the empirical and molecular formula of the molecule giving rise to the molecular ion peak at 148 m/z. The percentage composition by weight is 64.80 % carbon, 13.62 % hydrogen, and 21.58 % oxygen