10 Question-answer on Physics of nucleus and radioactivity 1. The neutron was discovered by (a) Marie curie (b) Pierre curie (c) James Chadwick (d) Rutherford Ans: ( c) 2. The mass number of a nucleus is (a) Always less than its atomic number (b) Always more than its atomic number (c) Sometimes equal to its atomic number (d) Sometimes more than and sometimes equal to its atomic number. Ans: ( d) 3. When the number of nucleons in nuclei increase, the binding energy per nucleon (a) Increases continuously with mass number (b) decreases continuously with mass number (c) remains constant with mass number (d) First increases and then decreases with increase...
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