An atomic nucleus A is composed of 84 protons and 128 neutrons
Modern Physics (10)An atomic nucleus A is composed of 84 protons and 128 neutrons. The nucleus A emits an alpha particle and is transformed into a nucleus B.
- What is the composition of B?
- The nucleus B emits a beta particle and is transformed into a nucleus C. What is the composition of C?
- What is mass number of the nucleus A?
- Does the composition of C change if it emits gamma radiations?
Answer
(i) The composition of B is
Number of proton = 82; Number of neutron = 126
(ii) The composition of C is
Number of proton = 83; Number of neutron = 125
(iii) Mass number of the nucleus A = 212.
(iv) No, the composition of a nucleus does not change if it emits gamma radiation.
- Exam Year: 2020