Ether
Helium is a element named after the Greek sun god, Helios.
No, there is no ancient Roman (or Greek) god named Dian. The closest would be Dionysus, from Greek mythology. However, in Irish/Celtic mythology, there is a character known as Dian.
Uranus is married to Earth.
No; it's always been called Mars, after the Roman god.
No-one knows...Greek mythology has no dates or chronology.
In Greek mythology, a god associated with sleep was Hypnos. In Roman mythology, this god is called Somnus. The Greek god of dreams was Morpheus.
In the regions known to ancient Greece and the Mediterranean.
There is a three headed dog in Greek Mythology, that guards he underworld. It is called Cerberus.
He is called Poseidon in Greek mythology, and Neptune in Roman mythology.
Saturn was called Saturn in roman mythology. Saturn in greek myth was called Cronus.
Greek Mythology, also called Classical Mythology is the ancient religion of the ancient Greeks: as reported and reduced by Greek poets of old.
Mars. He is called Aries in Greek mythology.
Chronos
Yes. It was called drachmas.
The dragons of Greek mythology - giant, serpentine monsters with rows of sharp teeth; called Drakones.
In Greek mythology it is Poseidon. But in Roman mythology, it is Neptune.
Midgard and Asgard are in Norse mythology not Greek, the bridge is called Bitfrost (the rainbow).