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hi faradewaals,
just crosschecked this question from arihant, it seems both tmh as well as fiitjee have printed the question wrongly.
here is the actual question:-
27Al13 is a stale isotope. 29Al13 is expected to disintegrate by:
(a)alpha emission
(b)beta emission
(c)positron emission
(d)proton emission
answer:-
thus extra neutrons are present increasing the n/p ratio.
thus it will disintegrate by converting a neutron into a proton and a beta particle.
thus answer is B.
PS:-
some1 plz tell me how to subscript and superscript. i remember reading somewhere about it, but cant find it again !!!!
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