Atomic number and mass number
3 marks · Easy| Particle | Relative mass | Relative charge |
|---|---|---|
| A | 1 | +1 |
| B | 1/1836 | -1 |
| C | 1 | 0 |
(a)[1 mark]
Name particle A.
(b)[1 mark]
Name particle B.
(c)[1 mark]
State the position in the atom of particle C.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) Proton
(b) Electron
(c) Nucleus · must show in nucleus, not in shell or outside
Common mistakes: Mixing up protons, neutrons and electrons by mass or charge
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Identifies particle A as proton
B2 (b) · 1 mark · Identifies particle B as electron
B3 (c) · 1 mark · States particle C is found in the nucleus
Worked solution
a) A is a proton (relative mass 1, charge +1).
b) B is an electron (relative mass 1/1836, charge -1).
c) Particle C (neutron) is found in the nucleus.