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State what is meant by the term 'first ionisation energy' and explain why the first ionisation energy of barium is lower than that of calcium

First ionisation energy is the energy required to remove one mole of electrons from one mole of gaseous atoms, to produce one mole of gaseous ions each with a (+1) charge. Barium has more energy levels than ...
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Answered by Varsha S. • Chemistry tutor
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Briefly discuss advantages and disadvantages of using ‘lawyers’ (solicitors and barristers) to resolve legal disputes.

Lawyers are frequently available, and in most areas of the country. They are generally specialists in specific areas of law, which is needed in a system as complex as the legal system, and know relevant the ...
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Answered by Jessica M. • Law tutor
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What are the main checkpoints to look out for when attempting an abstract reasoning question?

You need to look at the numerical side - numbers of objects, numbers of corners, numbers of sides to the shapes, the number of shapes + to the number of corners, the number of lines and contained shapes etc....
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Answered by Alyssa V. • UCAT tutor
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How do you approach the questions in the verbal section and finish in the time given?

I found that the best way to go about it is to look at the question first and pick out certain keywords. Then look at the big paragraph, skimming through until you find the keywords and then you should be ab...
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Answered by Alyssa V. • UCAT tutor
2491 Views

What does a vaccination involve?

An inactive form of the pathogen is injected into the body. The body detects the antigens on the surface of the pathyogen and this triggers the white blood cells (lymphocytes) to produce antibodies to combat...
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Answered by Alyssa V. • Biology tutor
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