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What is the difference between a period and a group in the periodic table

Groups and periods are just ways to divide and categorise elements in the periodic table according to their properties- be it physical or chemical. A period is the horizontal line and all the elements in one...
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Answered by Zoya K. • Chemistry tutor
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What is the difference between an exothermic and an endothermic reaction?

If a reaction is exothermic, it means that it gives out energy, heating up its surroundings, and so the products have less energy than the reactants. If a reaction is endothermic, it means that it takes in e...
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What is activation energy?

Activation energy is the amount of energy that the reactants need in order to react and become the products. For example, when burning natural gas (also called methane, or CH 4 ), you need a spark to light i...
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Answered by Oliver N. • Chemistry tutor
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What happens when a reversible reaction is at equilibrium?

A reversible reaction is one where the reaction can occur both ways. Therefore, in a closed system where nothing can escape, some products made will always react in the reverse direction to make the reactant...
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Answered by Yuhui Z. • Chemistry tutor
5398 Views

What is the difference between an alkene and an alkane?

Both alkenes and alkanes are chains of carbon and hydrogen molecules. The chains can be different lengths and each length chain has a different name. An alkene is a chain which has a double bond between two ...
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Answered by Emily H. • Chemistry tutor
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