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Why do ionisation energies increase across a period?

It's experimentally observed that ionisation energies have a general increase as one moves across the period: the first ionisation energy of lithium is ~500 kJ mol‑1, whereas that of n...

Answered by Tom D. • Chemistry tutor

10145 Views

What is the difference between constructive and destructive waves?

So, constructive waves are the waves that build up the beaches. They have a large 'swash', which means they can carry deposits of sand and other materials far up the beach. They are much lower than des...

Answered by C B. • Geography tutor

98968 Views

How do I revise for my English exam?

English exams can seem impossible to revise for, but that isn't the case. English exams can actually be the most fun to revise because it's less about remembering tonnes of specific facts and more abou...

Answered by Emily P. • English Literature tutor

7457 Views

What's the best way to memorise quotes for a closed-book exam?

Learning quotes for a closed-book exam can seem like a very daunting task, especially when you've studied a text in detail for an entire year. But it is an essential task as examiners are looking for g...

Answered by Eleanor C. • English Literature tutor

13331 Views

Solve simultaneously: x + y + 3 = 0 and y = 2x^2 +3x - 1

First Step:

I believe here it is important to firstly look at each equation on its own and just try to think how the examiner would want you to answer this type of question.