• Question: what are or is molecules?

    Asked by liv74766 to Antoine on 12 Nov 2013.
    • Photo: Antoine Buchard

      Antoine Buchard answered on 12 Nov 2013:

      Hi Live74766
      Atoms are the building block of all matter in the universe (you can imagine them as a brick or a marble. There are different types of atoms you may have heard of : hydrogen, carbon, phosphorus, nitrogen, sodium etc (look at the periodic table of elements).
      Molecules are groups of atoms that forms bigger building blocks which have them certain properties: they can be a liquid (water is a molecule), a gas (in the air, dioxygen is a molecule with 2 oxygen atoms), a solid (glass is made of silica which is a SiO2 molecule _ silicium and 2 oxygens), long viscous chain (your DNA or your plastic bag are long chain molecules called polymers). Cheers!
      Those molecules can then react together to give even bigger molecules etc etc.

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