Answer Happy

QUESTION 3 a) b) Beta plus decay also known as positron decay is one of the radionuclides decay. An atom of 233X undergoes the beta plus decay and produces beta particles. Write the chemical equation showing this reaction. Thickness of the paper (mm) 0.0 0.4 0.8 1.2 A staff at nuclear agency shows the visitor an experiment with radioactivity. He uses three different radioactive source which is alpha, beta and gamma. He uses the thickness of the paper between the source and the sensor to measure the nuclear radiation. The result as shown in Table 1. Explain which radiation comes from Source A, B and C. Source A (counts per second) 28 29 31 29 Table 1 [20 marks] Source B (counts per second) 62 21 1 1 [3 marks] Source C (counts per second) 59 55 43 40