The number of protons, neutrons and electrons in , respectively, are
71, 104 and 71
104, 71 and 71
71, 71 and 104
175, 104 and 71
For , No. of Protons = 71 = No. of Electrons. No. of Neutrons = Mass no. - No. of Protons = 175 - 71 = 104.
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