Chemistry is a branch of science that involves the study of the composition, structure and properties of matter. Often known as the central science, it is a creative discipline chiefly concerned with ...

Our tutorials can answer your questions! Navigate to the technology below for a description of the equipment, design specifications, and detailed tutorial video. For general equipment help, come to ...

For example, the atomic number of sodium is 11. Every sodium atom has 11 protons and 11 electrons. It has 11 positive charges and 11 negative charges. The mass number of an atom is its total number of ...

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