The train between Naples and Sorrento is a very cheap and quick way to travel between the two cities. Unfortunately, it also happens to be one of the worst in terms of pick-pocketing.
Definition of Element. 1) A substance that cannot be decomposed into simpler substances by chemical means. 2) One of the 116 presently known substances that cannot be decomposed by chemical reaction into a simpler substance. Elements comprise all matter at and above the atomic level.
An element is a substance consisting of atoms which all have the same number of protons - i.e. the same atomic number. Elements are chemically the simplest substances and hence cannot be broken down using chemical methods. Elements can only be changed into other elements using nuclear methods. Although an elementâs atoms must all have the same number of protons, they can have different numbers of neutrons and hence different masses. When atoms of the same element have different numbers of neutrons, they are called isotopes. The Most Abundant Elements