|Product #: SED10581_TQ|
Science Readers: Physical Science: Elements and Properties eBookGrade 4|Grade 5|Grade 6|Grade 7|Grade 8
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There are 90 different elements, like the oxygen that we breathe, that can be found in nature. When two or more elements combine, they are held together by a chemical bond and form a compound. In 1869, chemist Dmitri Mendel233ev organized the elements into a chart that is known as the Periodic Table of Elements.
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