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 that cannot be decomposed into simpler substances. This was the first useful definition of element, because it allowed elements to be distinguished from other substances experimentally.ocabulary allotrope atomic number atomic weight atoms Dalton's atomic theory isotope mixture nucleus substance An element is a type of matter composed of atoms that all have exactly the same positive charge on their nuclei.