MEDIUM
AS and A Level
IMPORTANT
Earn 100
What is meant by the terms electron shell and electronic configuration ?
Important Questions on Electrons in Atoms
MEDIUM
AS and A Level
IMPORTANT
Explain to another learner.
Why in terms of electronic configuration, the gases helium,neon and argon are relatively unreactive.
MEDIUM
AS and A Level
IMPORTANT
Draw a labelled diagram to show the structure of a calcium atom.
EASY
AS and A Level
IMPORTANT
What prefixes do you know that can be placed before the basic unit and what is their relationship to the basic unit ? For example, a centimetre (cm) is one-hundredth of a metre (m).
EASY
AS and A Level
IMPORTANT
Practise writing units in standard form,e.g becomes (the negative 3 shows that the is the divisor).Try changing the following into the standard form:
EASY
AS and A Level
IMPORTANT
Practice writing units in standard form,e.g becomes (the negative 3 shows that the is the divisor). Try changing the following into the standard form:
MEDIUM
AS and A Level
IMPORTANT
Why must the inside of an electron microscope be at very low pressure so that there is hardly any air present ?
MEDIUM
AS and A Level
IMPORTANT
Why must the specimens studied using an electron microscope have a dry surface ?
MEDIUM
AS and A Level
IMPORTANT
Why might it be useful to be able to look at a substance in more detail ?
