Читать книгу An Introduction to the Periodic Table of Elements : Chemistry Textbook Grade 8 | Children's Chemistry Books - Baby Professor - Страница 4

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An element is a substance that can’t be broken down by chemical methods into simpler substances. It is already the simplest substance. There are 118 elements in the periodic table.

An Introduction to the Periodic Table of Elements : Chemistry Textbook Grade 8 | Children's Chemistry Books

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