[" कण जो "92" U "^(238)" के नाभिक में नहीं उपस्थित हैं- "],[[" (i) "92" प्रोटॉन "," (ii) "92" इलेक्ट्रॉन "],[" (iii) "146" न्यूट्रॉन "," (iv) "238" न्यूक्लिऑन "]]

"_92U^235 and "_92U^238 differ as

What is the percentage of ""_(92) U ^(235) in ""_(92) U ^(238) ?

The number of electrons in ""_(92)U^(238) is

We are given the following atomic masses: ""_(92)^(238) U = 238.05079 u " " _(2)^(4)He = 4.00260 u ""_(90)^(234)Th = 234.04363 u" "_(1)^(1)H= 1.00783 u ""_(91)^(237)Pa = 237.05121 u Here the symbol Pa is for the element protactinium (Z = 91). (a) Calculate the energy released during the alpha decay of ""_(92)^(238)U . (b) Show that ""_(92)^(238)U can not spontaneously emit a proton.