Substance A has atomic mass number | NUCLEAR PHYSICS

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JEE MAIN_2023

S2_290123

Question

Substance A has atomic mass number 16 and half life of 1 day. Another substance B has atomic mass number 32 and half life of $\frac{1}{2}$day. If both A and B simultaneously start undergo radio activity at the same time with initial mass 320 g each, how many total atoms of A and B combined would be left after 2 days.

Select the correct option:

A

$3.38 \times 10^{24}$

B

$6.76 \times 10^{24}$

C

$6.76 \times 10^{23}$

D

$1.69 \times 10^{24}$

✓ Correct! Well done.

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