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22 March, 06:02

Which is an element? ... air ... carbon dioxide ... hydrogen ... water Description

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  1. 22 March, 06:07
    0
    The answer is Hydrogen.

    Hydrogen can be found in the periodic table. There other choices are not element but compounds, which is a molecule made of more than ONE element.

    Air is a mixture of gas molecules

    Carbon dioxide is CO2

    Water is H2O

    So as you can see, they se al made of different elements
  2. 22 March, 06:12
    0
    All Elements are obtained in the periodic table & water is Not an element it is a compound.
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