LESSON: 4. Metals and Non metals Elements: Elements are chemically simplest substance. A chemical substance is a pure substance consisting of only one type of atoms. Note: There are about 118 elements that have been discovered till now. Classification of elements: Basically elements are divided into following categories. 1.Metals: Eg: copper, sodium, calcium etc. 2.… Continue reading Ncert solution class 8 chapter 4 Metals and Non metals
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