![subject](/tpl/images/cats/biologiya.png)
Biology, 13.11.2020 14:00 bertha4082
If a rock sample has a half life of 10 years, and has 100 atoms of parent material today, how many half lives will have passed before it has only 25 atoms of parent material left?
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Biology
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 02:10
The terrestrial planets are characterized by having a a.) silicate core b.) iron-rich silicate core c.) iron-rich metallic core d.) none of these
Answers: 2
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 07:30
Climate warming trends allow plant and insect species to inhabit larger ranges. select the best answer from the choices provided
Answers: 2
![question](/tpl/images/cats/biologiya.png)
You know the right answer?
If a rock sample has a half life of 10 years, and has 100 atoms of parent material today, how many h...
Questions
![question](/tpl/images/cats/istoriya.png)
History, 13.04.2021 22:10
![question](/tpl/images/cats/en.png)
English, 13.04.2021 22:10
![question](/tpl/images/cats/mat.png)
Mathematics, 13.04.2021 22:10
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 13.04.2021 22:10
![question](/tpl/images/cats/ap.png)
Advanced Placement (AP), 13.04.2021 22:10
![question](/tpl/images/cats/mat.png)
Mathematics, 13.04.2021 22:10
![question](/tpl/images/cats/biologiya.png)
Biology, 13.04.2021 22:10
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 13.04.2021 22:10
![question](/tpl/images/cats/mat.png)
Mathematics, 13.04.2021 22:10
![question](/tpl/images/cats/istoriya.png)
History, 13.04.2021 22:10
![question](/tpl/images/cats/mat.png)
Mathematics, 13.04.2021 22:10