an atom contains 3 protons 3 electrons and 4 neutrons .Find its atomic – InterviewSolution

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1.	an atom contains 3 protons 3 electrons and 4 neutrons .Find its atomic number mass number and valency ?(given atomic mass Cl=35.5u,N=44u,S=32u,O=16u
Answer» Atomic number = Number of protons = 3Mass number = Number of protons + number of neutrons =3 + 4 = 7Electronic configuration of the atom is 2,1(K,L)Hence, its valency is 1

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