Physics · 2023
JEE Main · 29 January 2023, Shift 2 · Q18
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 1/2 day. If both A and B…
Substance A has atomic mass number $\displaystyle 16$ and half life of $\displaystyle 1$ day. Another substance B has atomic mass number $\displaystyle 32$ and half life of $\displaystyle \frac{1}{2}$ day. If both A and B simultaneously start undergo radio activity at the same time with initial mass $\displaystyle 320$ g each, how many total atoms of A and B combined would be left after $\displaystyle 2$ days.
Official answer
From NTA’s final answer key for this paper.
(1)
$\displaystyle 3.38 \times 10^{24}$
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JEE Main 2023 Physics question, with the answer from NTA’s final answer key. Where our answers come from.