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what is the mass number, no. of proton, no. of electron and number of neutron of He, Ne, Rn and Kr

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Explanation: pls see if my answer is correct thank you

proton, a stable subatomic particle that has a positive charge equal in magnitude unit of electron charge and a rest mass of 1.67262 x 10-27

, which is 1,836 times the mass of an electron