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baby6girgreea baby6girgreea
  • 22-01-2016
  • Mathematics
Answered

Some radioisotopes with the longest half-lives can remain radioactive for ________ of years.

Abillons
Bmillions
Cthousands
Dtens of thousands

Verified Answer :

PhineasJack
PhineasJack PhineasJack
  • 22-01-2016

A: billions of years :) 
Tellerium -128's half life is longer than she existence of the universe! 
xenon- 136 has a half life of 10^21 years.

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