CAIE A-Level Chemistry 1.1.5 Particle Beams in Electric Fields

Practise drawing and explaining proton, neutron and electron paths through the same electric field at equal speed.

Exam points

draw neutrons continuing undeflected because they carry no charge
draw protons toward the negative plate and electrons toward the positive plate
show greater electron curvature than proton curvature at equal speed because the electron has far lower mass

[Maximum number: 3]

All the Group 2 elements except beryllium have more than one stable isotope.

Fig. 2.1 shows the behaviour of a beam of protons in an electric field.

Complete Fig. 2.1 to show the behaviour of separate beams of neutrons and electrons in the same electric field.

Label your diagram clearly. Assume that the beams of each particle are moving at the same velocity.

Fig. 2.1

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1.1.5—Behaviour of beams of protons, neutrons question 1