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Discuss the trend in first ionisation energies across the second period of the periodic table.

First of all we must appreciate the general trend in these ionisation energies. The will always be endothermic (takes in energy) since we must put energy into a system to overcome the strong electrostatic...

JE
Answered by Jake E. Chemistry tutor
14782 Views

How can I study TS Eliot's The Waste Land?

The Waste Land is a very complex poem, with a lot of allegories and hidden meaning. It can be daunting, especially due to its length. However, it is worth spending time on it to properly...

CB
Answered by Caitlin B. English tutor
5451 Views

Describe what is meant by photoperiodism

A response controlled by relative light and dark periods. The name of the receptors responsible for absorbing light are phytochromes. The photoperiodic stimulus is detected by the 

AO
Answered by Amy O. Biology tutor
6512 Views

Explain why the second ionisation energy of boron is higher than the first ionisation energy of boron.

Boron is the 5th element in the periodic table, and has an electron configuration 1s22s22p1. The first ionization energy of Boron is the energy required to remove the s...

AI
Answered by Adelina I. Chemistry tutor
38761 Views

Prove the identity: sin^2(x)+cos^2(x) = 1

This is one of the most commonly used A level identities which can be proved using only GCSE maths!

Firstly, take an arbitrary right angle triangle with Hypotenuse h, and angle x between ...

SO
Answered by Sean O. Maths tutor
4788 Views

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