<h2>0.2 atm </h2>
Explanation:
The new pressure can be found by using the formula for Boyle's law which is

Since we're finding the new pressure

We have

We have the final answer as
<h3>0.2 atm</h3>
Hope this helps you
Option 4. ratio of electrons to protons
Isotope that has atomic number of 82 is stable. An element that has an atomic number ∠82 more stable except Tc and Pm. Also there is the concept that isotopes consisting a combination of even-even,even-odd,odd-even, and odd-odd are all stable. Many isotopes with no magic numbers of nucleons are stable