!PLEASE HELP ASAP! what is the half-life of the radioactive isotope? what mass of the radioactive isotope will be left after three(3) half-lives?

answer; /// the correct )

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation: