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updated - per "change the subscripts to proton number (they are currently neutron number!). From the centre (Ni) out, the subscripts should then be 28, 33, 38, 44, 46, 48, 50, 58, 66, 73, 76, 79, 82, 91, 102, 111, 114, 119, 122. The symbol for the thir...