1.

Which of the following statement is true         [MP PET 1993]

A.            \[_{78}P{{t}^{192}}\] has 78 neutrons
B.            \[_{84}P{{o}^{214}}{{\to }_{82}}P{{b}^{210}}+{{\beta }^{-}}\]
C.            \[_{92}{{U}^{238}}{{\to }_{90}}T{{h}^{234}}{{+}_{2}}H{{e}^{4}}\]
D.            \[_{90}T{{h}^{234}}{{\to }_{91}}P{{a}^{234}}{{+}_{2}}H{{e}^{4}}\]
Answer» D.            \[_{90}T{{h}^{234}}{{\to }_{91}}P{{a}^{234}}{{+}_{2}}H{{e}^{4}}\]


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