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Potassium (K) is in group 1 of the periodic table, therefore it has 1 electron in it's outer shell. Sulfur is in group 6 so it has 6 electrons in it's outer shell. Ionic bonds occur when electrons are tra...
It can be difficult to make sure that you are answering the question that has been asked of you under the stress of exam conditions. To overcome this I would recommend that you first make a checklist at t...
change everything to sixths. 21/6 - 14/6 = 7/6
For a reaction to occur molecules must collide with energy greater than or equal to the activation energy, in the correct orientation. The factors affecting the rate of a reaction are:Pressure of re...
The common mistake the students make is to simplify the fraction before factorising numerator and denominator. Here, we need to see that the numerator: x^2 - 4 is a difference between squaresMMAnswered by Martina M. • Maths tutor3843 Views
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