21. How are elements classified on the basis of chemical properties? Give two example of each
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the elements in the modren periodic table are classified on the basis of the chemical properties where the properties are like in the aame group so that we can observe that the elements are are arranged in the vertical row know as groups also arranged in according to their chemical properties.
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Chemical elements are broadly classified on the basis of their chemical properties into two groups: metals and non-metals.
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