3. What is an Element? Explain its various types?
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An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing a single proton and a single electron. If you change the number of protons an atom has, you change the type of element it is. ... Currently, scientists know of 118 different elements.
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An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing a single proton and a single electron. ... All known elements are arranged on a chart called the Periodic Table of Elements..
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