ICSE Class 10 Physics 2020 Solved Paper - Question 24 | ExamSiri

ICSE Class 10 Physics 2020 Solved Paper

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Question : 24 of 67

Marks: +1, -0

A nucleus

{ }_{84} X^{202}

of an element emits an alpha particle followed by a beta particle. The final nucleus is

{\Y}^{ {\b}}

. Find

a

and

b

.

Solution:

\;{ }_{84} {\X}^{202} { ────▸}↖{-α}{ }_{82} {\P}^{198}+{ }_2 {\He}^4

\;{ }_{82} {\P}^{198} {────▸}↖{-β}{ }_{83} {\Y}^{198}+{ }_{-1} {\e}^0

Comparing

{ }_{ {\a}} {\Y}^{ {\b}}

and

{ }_{83} {\Y}^{198}

; We get

a=83

and

b=198

.

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