Correct statement 1) Element can be divided into three classes, i.e. metals ,non-metals & gases.
2) Smallest independent unit of matter is atom.
3) Lead in your pencil is made up of metal lead.
4) 2N₂ represents four molecules of nitrogen gas.
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1. elements can be divided into three categories that is metals ,nonmetals and metalloids.
3. lead in your pencil is made up of graphite
4 2N2 represent two molecule of nitrogen gas
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