ICSE Class 10 Answered
In alpha decay 2 protons and two neutrons are lost by an atom
Does the number of elcetrons reamin same
Asked by lovemaan5500 | 21 Dec, 2017, 04:36: PM
Expert Answer
in alpha decay atomic number of alpha emiiting nucleus reduced by 2 and the alpha emitting nucleus is changed into different type of element.
For example in the following equation, Uranium is changed to thorium after alpha emission.
In this radioactive decay, thorium is neutral/excited atom but can have 90 electrons only, but the alpha particle is helium nucleus it does not have electrons. since Uranium is metal, the excess two electrons reside in the uranium metal as free eletrons and stay at the surface as surface charge
Answered by | 22 Dec, 2017, 12:35: PM
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