WASSCE Chemistry · Paper 1 style

Nuclear

One sample question with the full working. 1 more in the app, with instant feedback and repair sessions for the traps below.

An alpha particle is a

Afast electron
Bhelium nucleus
Celectromagnetic wave
Dneutron

Show the answer and working

Answer: B

Alpha = He nucleus.

Trap A Radioactivity in chemistry errors: Balance mass numbers and atomic numbers on both sides. α = ⁴₂He, β = ⁰₋₁e, n = ¹₀n.

Trap C Mixes up a pair of similar chemical terms: Keep a list of confusable pairs with one defining feature each and a hook. Underline the key word in the stem and check it against the definition, not the sound of the name.

Trap D Takes one factor as the whole answer: Ask whether the option is necessary or sufficient. If the stem involves two changes or two conditions, both must appear in the answer.

Traps in Nuclear

Radioactivity in chemistry errors
Balance mass numbers and atomic numbers on both sides. α = ⁴₂He, β = ⁰₋₁e, n = ¹₀n.
Mixes up a pair of similar chemical terms
Keep a list of confusable pairs with one defining feature each and a hook. Underline the key word in the stem and check it against the definition, not the sound of the name.
Takes one factor as the whole answer
Ask whether the option is necessary or sufficient. If the stem involves two changes or two conditions, both must appear in the answer.

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