The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is (a) 17 (b) 37 (c) 2 (d) 38

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The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is (a) 17 (b) 37 (c) 2 (d) 38
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Nov
The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is (a) 17 (b) 37 (c) 2 (d) 38 The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is (a) 17 (b) 37 (c) 2 (d) 38 November 26, 2020 [...]
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