how to recognize that the element or compounds are solid, liquid,gas or aqueous
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by their odour,taste,solubility in water,and density
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In an element if one metal, or non metal or metelloids or Noble gas are there they can be said as an element.
In compound if two elements are there it can be said as compound.
If substance are hard it is solid it cannot flow.
and liquid and gas are not hard.
In compound if two elements are there it can be said as compound.
If substance are hard it is solid it cannot flow.
and liquid and gas are not hard.
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