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How does the reactivity of group 7 elements (the halogens) change down the group and why? (A Level)

As you move down group 7 from fluorine to iodine, the reactivity of the elements decreases. The halogens are non-metals and when non-metals react with metals, they GAIN the electrons that the metals lose. As...
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Answered by Natalie L. • Chemistry tutor
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Represent 83 in 8 bit binary.

Start on the left side of the binary number - the first digit is the "128s" digit - there are no "128s" in 83 (as 128 is clearly larger than 128), so we start with a 0.Next is 64 - there ...
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Answered by Rose L. • Computing tutor
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Explain the advantages of red blood cells passing through a capillary one at a time (3 Marks)

Red Blood Cells (erythrocytes) are approximately 0.01 mm, so only one can pass through the small capillary. The advantage of this is that there is a larger surface area exposed, more time available and short...
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Answered by Erin C. • Biology tutor
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Solve x^2=4(x-3)^2

Start by look at the right hand side of the equation, first expand (x-3) 2 which is also the same as (x-3)(x-3). This comes out to equal (x 2 -6x+9). Next multiply (x 2 -6x+9) by 4 which was left outside of ...
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Answered by Louis R. • Maths tutor
4849 Views

Translate the following: Me gustaría ir al cine con mis amigos este sábado pero mi tío no me deja ir.

I would like to go to the cinema with my friends this Saturday but my uncle will not let me.
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Answered by William G. • Spanish tutor
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