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How and why does atomic radius vary in the periodic table?

Atomic radius increases down a group in the periodic table. This can be explained by a phenomenon called electron shielding. As the number of electron shells is increased down the group, the attraction be...

CS
Answered by Craig S. Chemistry tutor
5989 Views

Three positive whole numbers have a mean of 6. What is the greatest possible range of the three numbers?

The mean is the total of the numbers divided by how many numbers there are. So to find the mean of six, we need to add three numbers together, divide those three numbers by three and get six. This sounds ...

PW
Answered by Penny W. Maths tutor
17490 Views

What is and when do I use the subjunctive?

There is no common equivalent in English except for when you say "If I were to...". This shows an element of doubt in this phrase, meaning we don't use the conventional "I was". In Fre...

SG
Answered by Simon G. French tutor
2194 Views

How to prepare for a closed-book exam

The idea of a closed-book exam can be pretty daunting, but not having a text to rely on doesn’t necessarily mean you can’t get the same quality out of an essay if you were to have the book right in front ...

HL
4467 Views

Analyse the composition of Rodchenko's Spatial Construction No. 12 and consider the use of materials.

This ovular and geometrical construction from Rodchenko focusses solely on the exploitation of materials in space. The sculpture comprises of eleven ovular disks cut from plywood and then painted in dark ...

NV
6041 Views

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