Question

WILL GIVE BRAINLIEST FOR THE RIGHT ANSWER!!

Answer 1

Answer:

19 gram

Step-by-step explanation:

Formula of mass left after ionising: $\frac{M}{2^{n} }$  where M is original mass and n is half lives.

Using the equation:

$\frac{150}{2^{3} }$ → 18.75

Therefore, 18.75 g left after ionising.

∵ If rounded to nearest gram then 19 gram.