Substance A has atomic mass number

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:

$3.38 \times 10^{24}$

$6.76 \times 10^{24}$

$6.76 \times 10^{23}$

$1.69 \times 10^{24}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution