Atomic number and mass number
3 marks · Easy(a)[1 mark]
Name the sub-atomic particle with a negative charge.
(b)[1 mark]
State the relative mass of a proton.
(c)[1 mark]
Where is the neutron found in the atom?
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(a) Electron · must show electron
(b) 1 · must show 1
(c) In the nucleus · must show nucleus
Common mistakes: Mixing up sub-atomic particles
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Marking points
B1 (a) · 1 mark · Gives electron for negative charge
B2 (b) · 1 mark · Gives correct relative mass of proton as 1
B3 (c) · 1 mark · States neutron is found in the nucleus
Worked solution
a) The electron has a negative charge.
b) The relative mass of a proton is 1.
c) The neutron is found in the nucleus.