According to Soddy Fajan Law 'When an \( \alpha \)-particle is emitted, the daughter element has....
0According to Soddy Fajan Law
'When an \( \alpha \)-particle is emitted, the daughter element has atomic number 2 units less than that of parent element. It is
\( \mathrm{P} \)
consequently displaced two places (groups) to the left in the periodic table. When a \( \beta \)-particle is emitted, the daughter element has an atomic number 1 unit higher than that of parent element. It is consequently displaced one place (group) to the right in the periodic table".
\( { }_{90} \mathrm{Th}^{234} \) disintegrates to give \( { }_{82} \mathrm{~Pb}^{206} \). The number of \( \alpha \) and \( \beta \)-particles emitted in this process will be respectively
(1) 7,6
(2) 6,7
(3) 8,9
(4) 6,4
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