Russia currently owns the biggest stockpile of nuclear weapons in the world. Also Russia made and detonated the biggest nuclear bomb in history called the Tsar bomb.
No, USA did.
Russia or America.
US
It was a nuclear bomb. Everyone was afraid of a nuclear bomb. The nuclear power plant malfunctioned. The Cold War was about fear of nuclear attack.
A nuclear power plant uses a slow, controlled nuclear chain reaction to heat water and generate electricity. A nuclear bomb uses a very rapid uncontrolled nuclear chain reaction in order to generate a massive explosion.
perhaps biological
That would depend on the size of the nation. Which might you be referring to?
$1 million USD in Russia
Russia developed its own nuclear program, and was aided by espionage.
both obtain their power from the atomic nucleus, that is about where the similarity ends.
The Tsar Bomba; that was made by the Soviet Union (Russia)