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5.2.3a Radioactive decay

A nucleus of uranium-238 ( $92238U^{238}_{92}\text{U}$ ) emits an $α\alpha$ -particle to form a nucleus of thorium ( $Th\text{Th}$ ).

Which equation represents this decay?

$24α^{238}_{92}\text{U} \rightarrow \ ^{242}_{94}\text{Th} + \ ^{4}_{2}\alpha$

$−10β−^{238}_{92}\text{U} \rightarrow \ ^{238}_{93}\text{Th} + \ ^{0}_{-1}\beta^{-}$

$10β+^{238}_{92}\text{U} \rightarrow \ ^{238}_{91}\text{Th} + \ ^{0}_{1}\beta^{+}$

$24α^{238}_{92}\text{U} \rightarrow \ ^{234}_{90}\text{Th} + \ ^{4}_{2}\alpha$

5.2.3a Radioactive decay Questions

120 exam-style questions on CIE IGCSE Physics 5.2.3a Radioactive decay. Each one has a worked solution and a mark scheme showing where the marks go.

A nucleus of uranium-238 ( $92238U^{238}_{92}\text{U}$ ) emits an $α\alpha$ -particle to form a nucleus of thorium ( $Th\text{Th}$ ).

Which equation represents this decay?

$24α^{238}_{92}\text{U} \rightarrow \ ^{242}_{94}\text{Th} + \ ^{4}_{2}\alpha$

$−10β−^{238}_{92}\text{U} \rightarrow \ ^{238}_{93}\text{Th} + \ ^{0}_{-1}\beta^{-}$

$10β+^{238}_{92}\text{U} \rightarrow \ ^{238}_{91}\text{Th} + \ ^{0}_{1}\beta^{+}$

$24α^{238}_{92}\text{U} \rightarrow \ ^{234}_{90}\text{Th} + \ ^{4}_{2}\alpha$

120 exam-style questions on CIE IGCSE Physics 5.2.3a Radioactive decay. Each one has a worked solution and a mark scheme showing where the marks go.