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Explain the melting points of period 3 elements.

Going from Na to Si, the melting point increases. This is because from Na-Al, the charge of the metal ion and the number of delocalised electrons increases so the strength of the metallic bonding increases a...
AK
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How do I form a 'si' clause in French?

In English, a sentence like 'If I were rich, I would buy a house.' is an example of an 'if' clause. It is used to describe a hypothetical situation; something that would happen if a certain condition is fulf...
ML
Answered by Molly L. • French tutor
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How should I structure an opinion essay in Spanish?

The easiest way to approach an essay is to follow the standard formula: “introduction + development + conclusion”. The number of paragraphs you should aim for will depend on the specific task. For example, f...
AS
Answered by Aida S. • Spanish tutor
4746 Views

Find the set of values of k for which x^2 + 2x+11 = k(2x-1)

The discriminant for a quadratic polynomial of the form f(x) = ax^2 + bx + c is given by b^2 - 4ac. If the discriminant is strictly greater than 2, the quadratic has 2 real distinct roots, i.e 2 unique x-val...
WA
Answered by William A. • Maths tutor
14632 Views

How far do you agree that World War Two substantially changed the United States?

Breaking down an essay into smaller pieces can help to keep the argument clear and concise and ensures you are answering the question. Each essay can be based around the same basic frame work; an introductio...
EH
Answered by Elena H. • History tutor
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