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Standard IX

Chemistry

Uses of Radioactive Substances

A radioactive...

Question

A radioactive element X with half life $2$ h decays giving a stable element Y. After a time t, ratio of X and Y atoms is $1 : 16$ . Time t is?

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Solution

The correct option is A $6$ h
$\frac{x}{y} = \frac{1}{7}$

Total $8$ parts= $2^{3}$ gives $3$ lives

$t = 3 \times 2 = 6 h o u r s$

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A radioactive element X with half life 2 h decays giving a stable element Y. After a time t, ratio of X and Y atoms is 1:16. Time t is?

The correct option is A 6hxy=17Total 8 parts=23gives 3 livest=3×2=6hours

A radioactive element X with half life $2$ h decays giving a stable element Y. After a time t, ratio of X and Y atoms is $1 : 16$ . Time t is?

The correct option is A $6$ h
$\frac{x}{y} = \frac{1}{7}$

Total $8$ parts= $2^{3}$ gives $3$ lives

$t = 3 \times 2 = 6 h o u r s$