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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 c...

RW
Answered by Rebecca W. • Chemistry tutor
14086 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

SB
Answered by Sophie B. • English tutor
1652 Views

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

DS
Answered by Dhylon S. • Maths tutor
3987 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...

DS
Answered by Dhylon S. • Economics tutor
5880 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 po...

JM
Answered by Joseph M. • Maths tutor
3573 Views

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