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Chapter 6 The Periodic Table and Periodic Law ... Chapter 16 Energy and Chemical ... Matter and Change • Chapter 3 3 MatterMatter——Properties and ...
6.1 Formula Mass. The formula mass of a substance is the sum of the average atomic masses of each atom represented in the chemical formula and is expressed in atomic mass units.
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2.1 Electrons, Protons, Neutrons, and Atoms An atom is made up of protons and neutrons in the nucleus and electrons arranged in energy shells around the nucleus. The first shell holds two electrons, and outer shells hold more, but atoms strive to have eight electrons in their outermost shell (or two for H and He).
Start studying Chapter 17 Properties of Atoms and the Periodic Table. Learn vocabulary, terms, and more with flashcards, games, and other study tools.