Who usually gets chemotherapy, is there a specific group that it is more common in (children , the elderly , etc)

elderly, specifically 50-74.

Explanation:

According to macmillan.org, the risk for cancer increases with age.

https://www.macmillan.org.uk/information-and-support/...cancer/what-is-cancer.html

If we are to go off of percentages, I would say a higher percent of children (per capita) get chemo, as it is a lot harder to say, "oh well i will die soon anyways" with a child.

is in the form atp or adenosine triphosphate