Chemistry, asked by pppp73, 1 year ago

what will be answer of question 20

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Answered by dhanashri35
2
option number A is correct

pppp73: dude i have asked for question 20
Answered by anu24239
5
the answer of 21 is a
because the atomic no and atomic mass of hydrogen is 1 that's why it has only one electron and one proton in there atom
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