Cesium is a radioactive element used medically in various imaging devices (ie, to make pictures of body organs), and technically and industrially for similar imaging purposes.
It can also be used...
Yes. Cesium is a live radiation souce that is used to treat a localized area. Chemo is a systemic therapy that courses through the entire body (it is not radioactive).
Not any more, but it was. Back in the day, there was a special fuel engineered called JP-7 that was developed to have the high flash point necessary for safe use in a special aircraft. That aircraft...