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The melting points of ionic compounds are higher than the melting points of molecular compounds because of strong attractive forces between particles.
Definition of Molecular Compounds
Molecular compounds are atoms linked together by various electrons, in essence they bind together electrically neutral particles called molecules.
Structure of Molecular Compounds
Molecules are formed by 2 (two) or more atoms. Molecules can be defined as groups of atoms that are tightly bound together, with relatively weak bonds between groups of like atoms. A molecule can consist of atoms of the same element (for example oxygen O2), or consist of different elements (for example water H2O). Atoms and complexes that are non-covalently related (eg bonded by hydrogen bonds and ionic bonds) are not generally considered to be a single molecule.
In every molecule, the atoms are held together by strong attractive forces, usually in the form of primary bonds. Conversely, the bonds between molecules are weak, so that within certain limits each molecule can move freely. A molecule is defined as a group of atoms (at least two) which are very strongly (covalently) bonded to each other in a certain arrangement and are neutrally charged and quite stable. According to this definition, molecules are different from polyatomic ions. In organic chemistry and biochemistry, the term molecule is used less rigidly, so that organic molecules and charged biomolecules are also considered molecules.
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