Take the local train, Circumvesuviana, from the Sorrento Central train station to the Naples Central Railway Station. Sorrento is the last and first stop on its trip around the Gulf of Naples, so you don't have to worry about getting on a train in the wrong direction. Train fare costs about $5.50.
How elements are formed. Our world is made of elements and combinations of elements called compounds. An element is a pure substance made of atoms that are all of the same type. At present, 116 elements are known, and only about 90 of these occur naturally.
The two most common elements in the universe are also the two smallest ones: hydrogen and helium. Hydrogen is by far the most common element in the universe because it was the first element in the universe to be created.The Big Bang caused all of the hydrogen in the universe to be formed at the beginning.This hydrogen was then the basis for all heavier elements to be formed through fusion reactions. Since helium is formed by the fusion of two hydrogen atoms, it is the second most common element in the universe.The heavier elements like iron are much less common in the universe since they require more fusion reactions to occur. llltkl | College Teacher | (Level 3) Valedictorian.ince helium is formed by the fusion of two hydrogen atoms, it is the second most common element in the universe. The heavier elements like iron are much less common in the universe since they require more fusion reactions to occur. llltkl | College Teacher | (Level 3) Valedictorian.