MEDIUM
AS and A Level
IMPORTANT
Earn 100
Explain in terms of number of protons and electrons why a sodium ion has a single positive charge but an oxide ion has a charge.
Important Questions on Atomic Structure
MEDIUM
AS and A Level
IMPORTANT
Explain what you know about attraction or repulsion of positive and negative charges.
MEDIUM
AS and A Level
IMPORTANT
Why do you think that tiny clusters of atoms are useful for catalysts?
HARD
AS and A Level
IMPORTANT
How do you think that you could make tiny clusters of metal atoms on a cold surface?
Tip: Think about breathing onto a cold surface.
MEDIUM
AS and A Level
IMPORTANT
What other uses could be made of tiny groups/clusters of atoms?
HARD
AS and A Level
IMPORTANT
What advantages and disadvantages could there be in using tiny clusters of atoms to help deliver medical drugs and in cancer treatment?
MEDIUM
AS and A Level
IMPORTANT
What else do you think nanomachines could be used for?
MEDIUM
AS and A Level
IMPORTANT
A beam of electrons is passing close to a highly negatively charged plate. When the electrons pass close to the plate, they are deflected away from the plate.
a) What deflection would you expect, if any, when the experiment is repeated with beams of i) protons and ii) neutrons? Explain your answers
b) Which subatomic particle (electron, proton or neutron) would deviate the most? Explain your answer.
EASY
AS and A Level
IMPORTANT
Using the information given in table deduce the number of electrons and neutrons in a neutral atom of vanadium.
| Atom | Mass number | Proton number |
| Vanadium | 51 | 23 |
