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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 negatively charged electrons that shield the positive nucleus from the outer shell electron. (1...
AG
Answered by Alice G. • Chemistry tutor
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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
7210 Views

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
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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
2641 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
12190 Views