Carbon-14 and carbon-11 are different isotopes of carbon used in medicine. State the similarity and the difference between the composition of the nuclei of carbon-14 and carbon-11.

similarity

difference

10(b)(i)Radioactive Decay Nuclear EquationsEasy2 marks

A carbon-14 nucleus decays into a nitrogen (N) nucleus by the emission of a beta particle (

β

-particle). Complete the nuclear equation for the decay.

_{6}^{14} C \to N + β

Give the nucleon number and the proton number of the nitrogen nucleus and of the beta particle.

particle	nucleon number	proton number
nitrogen, N	Table answer nitrogen_nucleon number	Table answer nitrogen_proton number
beta particle, $β$	Table answer beta_nucleon number	Table answer beta_proton number

10(b)(ii)Radioactive Decay Nuclear EquationsEasy1 mark

State the change that occurs in the carbon-14 nucleus during the decay.

10(c)Half Life Exponential DecayEasy2 marks

Scientists discover an ancient wooden object. The object contains

1.0 \times 1 0^{- 10}

g of carbon-14. The object contained

8.0 \times 1 0^{- 10}

g of carbon-14 when it was made. Carbon-14 has a half-life of 5700 years. Estimate the age of the ancient wooden object.