CBSE Class 11-science Answered
what is the difference between atom and molecules ,
and in element and substance ....
Atom |
Molecule |
Atom is a smallest particle of an element. |
Molecule is a group of two or more atoms combined together. |
Atom consists of nucleus (containing protons and neutrons) and electrons. |
Molecule consists of combination of two or more same or different atoms chemically bound together. e.g. H2, HCl, NaCl etc. |
Atom can neither be seen through naked eye nor through magnifying microscope. |
Molecule is not visible to naked eye, while can be seen through highly magnifying microscope. |
Atom cannot be further divided. |
Molecule can further be divided to give individual atoms. |
Atoms may or may not have independent existence. |
Molecules are capable of having independent existence. For example, atom of oxygen (O) has no independent existence while its molecule exists as O2 in nature. |
Atom has nuclear bond or attraction within it i.e. it involves electrostatic attraction between the positive nucleus and electrons. |
Molecule has chemical attraction or bonding between the atoms i.e. it involves single, double or triple bonds between the atoms. |