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Periodicity shows a fairly smooth increasing trend across a period for ionisation energy. However, between groups 2 & 3 and groups 5 & 6, the trend doesn't appear to be followed. Using your knowledge of chemistry, explain why the trend isn't followed here

For elements in group 2, their valence electrons consist of "ns 2 " where n is the principle quantum number/shell number. However, for elements in group 3, their valence electrons consist of "...
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Answered by George W. • Chemistry tutor
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Solve the equations x-y=1 and 5x-3y=13

These equations are what we call 'simultaneous' which means they are solved together. To do this, we need to make one of the variables (x or y) the subject of either of the equations.Rearranging the first eq...
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Answered by Christopher K. • Maths tutor
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Draw the full structual diagram of ethyl-ethanoate, labeling relevent bond angles and explain why the molecule has this structure.

(unable to draw diagram and upload in this format) ethyl ethanoate has the semi structural formula of CH3COOCH2CH3. According to electron repulsion theory the bond angle around the second carbon atom would b...
Answered by • Chemistry tutor
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What is Iambic Pentameter in Shakespeare's work?

Iambic Pentameter is a meter which Shakespeare frequently uses in his poetry and plays. Let's break the term down: An 'Iamb' is an unstressed syllable followed by a stressed syllable ('daDUM.')'Penta' means ...
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How do I approach a source question?

Firstly, you must always check any accompanying text with the source which could provide the date of publication and potentially where it was published or written. Once this is established you may use your o...
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Answered by Bethany R. • History tutor
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