A produces B by α- emission. If B is in the group 16 of periodic table, what is the group of A ?

Monjur Alahi

A produces B by α- emission. If B is in the group 16 of periodic table, what is the group of A ?


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Salim Ahmed Kawsar

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\(_Z^AA \overset{\propto-Emission}\longrightarrow\) \(_{Z-2}^{A-4}B\) + \(_2^4He\) 

When α-emission occurs, atomic number decreases by 2 and atomic mass number by 4. 

Thus, 

If ‘B’ belongs to group 16 of periodic table, that means outermost orbit will contain 6 electrons.

Thus,

‘A’ will have 8 electrons in its valence shell and it will belong to group 18 of the periodic table.

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