Chernobyl scattered the material from a reactor core the size of a house over the surrounding area. Hiroshima exploded a football sized piece. There was 300-500

Chernobyl scattered the material from a reactor core the size of a house over the surrounding area. Hiroshima exploded a football sized piece. There was 300-500x as much radioactivity released from Chernobyl. Although a slightly different mix of isotopes - this is relatively minor Think of it as the difference between a roadside bomb (small amount of energy concentrated in one place) and a forest fire (huge amount of energy spread over large area)