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ICSE Class 7 Answered

Define atom and molecule
Asked by ranihem2002 | 23 Aug, 2018, 11:30: AM
answered-by-expert Expert Answer
Atom:
  • An atom is very small in size and it consists of the subatomic particles protons, neutrons, and electrons.
  • They are so small that they cannot be seen even under the most powerful microscope.
  • About one million atoms stacked up one over the other would roughly equal the thickness of a sheet of a paper.

Molecule:

  • A molecule is a group of two or more atoms chemically bonded together. A molecule is the smallest particle of an element or a compound which has properties of the element or the compound and can exist in a free state.
  • Molecules can be formed either by the combination of atoms of the same element or of different elements.
  • Thus, there are two types of molecules — molecules of elements and molecules of compounds.

Answered by Varsha | 23 Aug, 2018, 02:29: PM

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