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Definition of science ??
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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 neutrons an atom has, you make an isotope of that element. Currently, scientists know of 118 different elements.
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Science, any system of knowledge that is concerned with the physical world and its phenomena and that entails unbiased observations and systematic experimentation. ... In general, a science involves a pursuit of knowledge covering general truths or the operations of fundamental laws.
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