Atoms
Atoms is the smallest particle of an element that retains the chemical properties of element. The atoms of many elements are bonded together in groups to form particles called molecules. Atoms consist of three main types of smaller particles such as protons, neutron and electrons
Molecules
Molecules is the smallest particles of an element or compound that normally exist on its own and still retains its properties
Elements
A substance which cannot be split into a simpler substance by chemical reaction. There are just over 100 known elements classified in the periodic table
A substance which cannot be split into a simpler substance by chemical reaction. There are just over 100 known elements classified in the periodic table
Compound
A combination of two or more elements bonded together in some way. It has different physical and chemical properties from the elements it is made of. Compound are often difficult to split into their elements. The proportion of each element in a compound is constant example water (H2O) is always formed from two parts of Hydrogen and one part oxygen
A blend of two or more elements and/or compound which are not chemically combined. The proportion of each elements or compound are not fixed and each keep its own properties. A mixture can usually be separated into its elements or compounds fairly easily by physical means
Hope thats help!