Mr. Avogadro started with 5.14x10^22 atoms of Pa-234. Ten days later Mr. Avogadro calculated the original sample had only 6.43 X 10^21 atoms of Pa-234. What's the half life of Pa-234? PLEASE HELP WILL MARK BRAINLIEST!!

6.022x10^23 is Avogadro’s number. The question is asking for the half life of Pa-234. Avogadro’s number is part of what you would use to solve for the half life of Pa-234. The half life of Pa-234 is about 1.17 minutes. Half life will have time as it’s units such as minutes, hours, days, weeks, and months.

Organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.