What fraction of Fr-220 remains unchanged after 82.2 seconds?
20
1/2
1/8
1/16

What fraction remains undecayed after 241.84 years (half life = 30.23 yrs)? 10. How many half-lives of K-37 will pass after 6.15 seconds (half life = 1.23 s)? 11. What fraction of Pu-239 (an artificially produced isotope used as a fuel in some nuclear fission reactors) remains undecayed after 219,600 years (half life = 24,000 yrs)? 12.

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

b

explanation:

mitosis