Which particle determines the chemical behavior of the atom?

Electron

Which amphibian famously secretes a toxin powerful enough to kill up to 10 people? Which puzzle-solving archaeologist made his video game debut in 1996 on the PlayStation? What monster attacked Luke Skywalker on Hoth? What is the name of the comic book Phoebe created? What's the title of the song Ross dedicates to Rachel on the radio?