19.Compounds: a)Are the same as mixtures? b)Can be separated by their physical properties c)Contain only type of element d)Are different kinds of atoms chemically combined with each other?
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(d)
Explanation:
A compound is a material formed by chemically bonding two or more chemical elements. The type of bond keeping elements in a compound together may vary: covalent bonds and ionic bonds are two common types. The elements are always present in fixed ratios in any compound.They cannot be separated by physical methods.
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Compounds : d) Are different kinds of atoms chemically combined with each other......
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