what is an atom element compound and molecule
An atom is the smallest particle in anything and everything.An element only has one type of atom and is found in a periodic table. A molecules is two atoms joined together. A compound is two or more elements chemically joined.Both elements and compounds have molecules. Hope this helps.eport Abuse. an atom is the smallest undevidable substance of matter. an element is a substance made by two similar atome by a covalent bond. a molecule is a group of atoms; different ,made by a covalent bond. a compound is a substance made by ionic bond.
A compound is formed when atoms or molecules of different elements combine. In a compound, elements are chemically combined in a fixed proportion. Examples: 1  Hydrogen and oxygen are combined in a fixed proportion of 2:1 to form the compound water [H 2 O]. Since atoms are electrically neutral, the number of protons equal the number of electrons in an atom. 2  Atomic weight (or relative atomic mass) of an element is the number of times an atom of that element is heavier than an atom of hydrogen. 3  The atomic weight of hydrogen is taken to be unity [1].