mass number of three different element is 40 but their atomic number are 18 19 and 20 respectively what will be the number of protons and neutrons in them?
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first P - 18
N - 22
second P - 19
N - 21
third P - 20
N - 20
N - 22
second P - 19
N - 21
third P - 20
N - 20
tanmayingole:
thanks for answering
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