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An atom.
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An atom is defined as the smallest part, smallest part of an element.
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While an element is the purest substance containing only one kind of atom.
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The purest substance, substance containing only one type of, one type of atoms.
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While a molecule, a molecule is formed by the interaction of atoms.
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And we can say a molecule is defined the purest substance, purest or pure substance containing more than one, containing more than one type or kind of elements, kind of elements or we can say atoms.
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A molecule is made up of by the interaction of more than one type of atoms.
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Here in this question we are given different species and we have to identify those species into atom or molecule.
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The first is oxygen, second is k positive, third is nacl, fourth is, fourth species is co2 and fifth one is hydrogen and sixth one is beryllium.
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If we see here, oxygen is an element and this is the smallest part of oxygen element.
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So this is a atom.
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While potassium ion is a ionic form of an element that is potassium.
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So this is a ionic form of an atom that is potassium.
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So for ionic form of potassium is potassium ion...