Top answers

Explain why chlorine is more reactive than iodine.

Both Cl and I in Group 7. Both have 7 electrons in its outer shell and require 1 electron to obtain a full shell. Reactivity of these halogens correspond to its ability to gain an electron. Cl can gain an el...
MR
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How should I approach an essay question in a writing exam?

Many people worry about these type of exam questions however, if you follow a set way of approaching them, then they are much less daunting that you might think. Here are my top tips:1) Make you fully unders...
TB
Answered by Thomas B. • Spanish tutor
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How is the sperm cell adapted to its role?

The role of the sperm cell is to fertilise the egg.- It has a streamlined shape with a tail which enables it to swim towards the egg.- It has a head with a nucleus, which contains the genetic material.- It h...
IS
Answered by Iona S. • Biology tutor
14641 Views

Find the turning point of the curve whose equation is y = (x-3)^2 + 6.

The turning point can be found by using the concept of transformations. Firstly, it is important to form a relation between the values of a and b in an equation of the following form y = (x+a)^2 + b and the ...
SV
Answered by Sai V. • Maths tutor
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What is stratified sampling?

A sampling method where subgroups (strata) of the target population are identified and participants are subsequently sampled from these subgroups in proportion to their occurence in the target population.
LW
Answered by Lauren W. • Psychology tutor
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