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Physics Question on Nuclear physics

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 12\frac1{ 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.

A

3.38×10243.38×10^{24 }

B

1.69×10241.69×10^{24 }

C

6.76×10246.76×10^{24 }

D

6.76×10236.76×10^{23}

Answer

3.38×10243.38×10^{24 }

Explanation

Solution

The correct option is (A): 3.38×10243.38×10^{24}