An eon is not a set period of time - instead, it is considered to be an age, usually consisting of 2 or more eras. Just think of it as a very long period of time. It is the largest division of geologic time.
The eon after the Hadean Eon is the Archean Eon. During this eon, significant geological and biological events took place, leading to the development of early life forms on Earth.
I don't know the plural of eon but the answer is more than 1 eon
I am currently in the Phanerozoic Eon.
It was in the Phanerozoic Eon.
Paleozoic eon
It is the Phanerozoic Eon.
It is apart of the Phanerozoic Eon.
Eon Mora is 5' 4".
Eon McKai was born in 1980.
Eon London is 5' 7".
Hyundai Eon was created in 2011.
Modern Eon ended in 1982.