What element is formed by the radioactive decay of (a) ( ) 24 11 − Na ; (b) ( ) 22 11 + Na ; (c) ( ) 210 15 P ?
(a) 2411Na → 2412Mg + e-
(b) 2211 Na → 2210Ne + e+
(c) 21015 P: there is no such an isotope. It is too heavy.
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