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Explain why reactivity increases as you go down group 1 (alkali metals) of the periodic table ( 3 marks )

As you go down the group, there is an additional electron shell added each time (1). These electron shells hold negativley charged electrons that shield the positive nucleus from the outer shell electron. (1...
AG
Answered by Alice G. • Chemistry tutor
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Outline the hormonal memchanisms involved in the control of eating behaviour (6 marks)

Ghrelin and leptin are the two main hormones associated with the control of eating. Ghrelin, which is released from the stomach, activates the hypothalamus and increases a person's appetite. The levels of th...
FK
5017 Views

Can you explain the trend in ionisation energy across the periodic table?

Simply put, it is down to the attraction between positive and negative particles. The protons within the nucleus of an atom make the nucleus 'positive'. In contrast, electrons are 'negative'. If you imagine ...
JI
Answered by Joseph I. • Chemistry tutor
2664 Views

Why is age classification important for films and television programmes?

Age classification is an important part of film distribution. Without knowing the age rating for a film, a potentially underage audience member could watch harmful content. However ratings are predominately ...
JG
12212 Views

How can i make my medical school application stand out and what will give me the 'edge'?

The answer to this lies in the title. Do something other people haven’t done and for this we need to think outside the box. Medicine is extremely competitive; there must be a reason you've worked so hard and...
HF
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