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State the trends in reactivity of the group 1 and group 7 elements and explain the reasons why.

Elements react by gaining or losing electrons. Elements wants to reach the stable state of having 8 electrons in the outermost ring, so group 1 elements react by losing an electron, since they have only 1 el...
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Answered by Lorne F. Chemistry tutor
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Represent x = 0.0154 recurring as a fraction.

To represent x = 0.0154 recurring as a fraction you need to eliminate the recurring element. You do this by finding the nearest multiple of x with the same recurring decimal element. For example, multiplying...
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Answered by Lorne F. Maths tutor
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'The Electoral College is no longer fit for purpose'. Discuss.

This question asks whether the American electoral system, the Electoral College (EC), is still the best way to elect the President of the United States. A question like this requires you to consider both the...
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Calculate 64^2/3. (No calculator)

64 2/3 may seem difficult to calculate at first but really boils down to two simple steps. This is because 64 2/3 = (64 1/3 ) 2 . This shows we can first do the operation inside of the brackets, followed by ...
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Answered by Harry L. Maths tutor
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Is momentum a vector quantity? Why?

Yes - Momentum is a vector quantity. A vector quantity possesses both a magnitude and direction. A scalar quantity possesses only a magnitude and no direction. Mass is an example of a scalar quantity (mass d...
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Answered by Harry L. Physics tutor
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