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Does reactivity increase or decrease as you go down group 7?

Reactivity will decrease as you travel down group 7 in the periodic table. Group 7 elements need to gain an electron to become stable as they need 8 electrons in their outer shell. Group 7 elements only cont...
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Answered by Rebecca W. • Chemistry tutor
17498 Views

How can I know how best to structure an essay, especially with a multi-text question?

Essay structure is arguably both the most important element of a good answer, and the one which worries students the most! This shouldn't be the case, as actually the best structures are simple and flexible ...
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Answered by Sophie B. • English tutor
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Differentiate y = lnx + 4x^2 + 3e^4x with respect to x

lnx differentiates to 1/x 4x^2 differentiates to 8x 3e^4x differentiates to 12e^4x therefore the answer is: 1/x + 8x + 12e^4x
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Answered by Dhylon S. • Maths tutor
4634 Views

Evaluate measures that could be pursued by individual firms and by the government to reduce a current account deficit (30)

The current account on the balance of payments measures the inflow and outflow of goods, services, investment incomes and net transfers. A deficit on the current account means that the value of imports is gr...
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Answered by Dhylon S. • Economics tutor
6829 Views

Show that (4x – 5)^2 – 5x(3x – 8) is positive for all values of x

(4x-5)^2-5x(3x-8) (16x^2-40x+25)-(15x^2-40x) 16x^2-15x^2-40x+40x+25 x^2+25 if x = positive, x^2 will be positive. if x = negative, x^2 will be positive. x^2 is positive for all values of X, +25 will not make...
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Answered by Joseph M. • Maths tutor
4258 Views