### Clue: All forms of uranium are equals, no question (8)
### Answer: ISOTOPIC 
 ### Explanation: Definition: All forms of uranium are
 IS(equals, as in "100% of nothing is nothing") + [ O(signifying 0;nothing;none of) TOPIC](an issue;a question that is under discussion).
Defn: Chemically, descriptive of the various forms of an element, having the same number of protons, but different numbers of neutrons. Uranium is singled out as it has many isotopes and all are radioactive.