Uranium explode when a critical mass exist.
Less and less as the Uranium decays into lead and other elements.... More and more as super-novae explode and fuse elements into Uranium...
Uranium metal (enriched in uranium-235 up to 99 %) is a nuclear explosive, if the critical mass is reached. Also criticality accidents are possible in uranium plants or uranium storage areas.
If you use Nuclear Fission then yes it does explode. (Nuclear Fission is the splitting of two atom cells.)This is one way USA gets energy.
No critical mass underground; but as a curiosity read about the Oklo phenomenon.
The original ones were a ball of uranium with explosives all around it to press it into a critical mass so it would explode.
I don't know why you would ask but it will explode and you will die no matter hoe far away you are from the explosion.
Coal is produced by sunlight falling on plants. These plants then get fossilised to form the coal.Uranium is formed by Stars as they explode in Supernova explosions.
I'm guessing it would make a " squish" sound because it's a soft metal and can be cut by a knife. Or it would make a slight " bing". Lastly, it might explode 'cuz it's radioactive. ------------------------------------------------- Excuse me, but I worked more than 39 years with uranium: - the sound is metallic - uranium is not a soft metal and it is impossible to cut uranium with a knife; it is difficult to cut an uranium piece also with a laser !
Enriched uranium: uranium with more than 0.7 % uranium 235. Uranium 238 is not enriched uranium.
Uranium dioxide, triuranium octaoxide, uranium triiodide, uranium tetraiodide, uranium tetrachloride, uranium tetrafluoride, uranium hexafluoride, ammonium diuranate, uranium sulphide, uranium nitride, uranium carbides, uranium silicides and hundred others.
sudden super-criticality causing a prompt-critical chain reaction. total time for reaction is a couple microseconds and a high yield explosion results.