atomThe smallest unit of an element
Definitions:
The basic unit of a chemical element.
bombardmentAn attack by dropping bombs
Definitions:
A continuous attack with bombs, shells, or other missiles.
obliterateDestroy utterly or wipe out
Definitions:
To destroy so as to leave no trace.
survivorA person remaining alive after an event
Definitions:
A person who survives, especially a person remaining alive after an event in which others have died.
radiationEmission of energy as electromagnetic waves
Definitions:
The emission of energy as electromagnetic waves or as moving subatomic particles.