the atomic number of an element is 4 and mass number is 9 then : what is the no. of proton and neutron in it.
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Answer:
Neutron are neutral and proton are equal to atomic no 4 in positive...the 4 atomic number element is beryllium
Answered by
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Explanation:
Neutron are neutral and proton are equal to atomic no 4 in positive...the 4 atomic number element is beryllium
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