Carbon-14 is a radioactive isotope of carbon with an atomic number of 6 and a mass number of 14.
Complete the table below by filling in the missing information about the particles in this atom:
Name of particleNumber of particlesPosition of particleRelative charge of particleelectronneutronin the nucleus6+1 (plus one) \begin{array}{|c|c|c|c|} \hline \textbf{Name of particle} & \textbf{Number of particles} & \textbf{Position of particle} & \textbf{Relative charge of particle} \\ \hline \text{electron} & & & \\ \hline \text{neutron} & & \text{in the nucleus} & \\ \hline & 6 & & \text{+1 (plus one)} \\ \hline \end{array} Name of particleelectronneutronNumber of particles6Position of particlein the nucleusRelative charge of particle+1 (plus one)An archaeological specimen made of ancient charcoal is discovered. When the wood was freshly burned, it contained 24.0 mg24.0\text{ mg}24.0 mg of Carbon-14. The specimen now contains 3.00 mg3.00\text{ mg}3.00 mg of Carbon-14. The half-life of Carbon-14 is 573057305730 years.
Calculate the age of the charcoal specimen.
484 exam-style questions on CIE IGCSE Physics 5.2 Radioactivity, covering 5.2.1 Background radiation and measuring count rate, 5.2.2a Alpha, beta and gamma emission, 5.2.2b Deflection and ionising effects of nuclear radiation, 5.2.3a Radioactive decay, 5.2.3b Effects of decay on the nucleus and decay equations, 5.2.4a Half-life, 5.2.4b Choosing isotopes for applications, and 5.2.5 Effects of ionising radiation and safety precautions. Each one has a worked solution and a mark scheme showing where the marks go.