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...ign="left "> 84 <td> [[Polonium|Po]] <td width="5%" > {{Atomic mass|Polonium}}

...polonium in the core. It released neutrons when compressed. ²¹⁰polonium, the radioactive component, has a half-life of only 140 days after being ma ..., in direct contact with the innermost sphere of a nickel- and gold-plated polonium ball, the "urchin" neutron generator. Solid cores have several disadvantage

...rial, emitted neutrons. Codenamed the "Urchin", it was a sphere of mixed [[polonium]] (²¹⁰Po) and [[beryllium]]. <ref name=Sublette8.0>{{citation

| 84 || Po || [[polonium]]

...] and [[uranium]], and, notorious since the poisoning scandal in the UK, [[polonium]].

...olinium]] <td align="right"> 64<td width="15%"> <td>Po <td width="5%" >[[Polonium]] <td align="right"> 84 ...<td> Ag <td width="15%"> <td align="left "> 84 <td width="5%" > [[Polonium]] <td> Po

Putin's signature poison <ref name=Putin/> '''polonium''': <SUP>210</SUP>Po is made in reactors by adding

...cific activity (radioactivity per unit mass). In this way, they isolated [[polonium]] and [[radium]].