Back to category: Science Limited version - please login or register to view the entire paper. Biology Study Guide Chapters 2 & 3 Study Guide (Chapter 2) Atoms: Consist of Protons(+), Neutrons, and Electrons(-) - Number of Protons = Number of Electrons - Protons + Neutrons = Mass Number - Number of Protons = Atomic Number Isotopes: Same number of protons but different number of neutrons - All isotopes of an element interact with other atoms in the same way Orbitals: - Can house 1 or at most 2 electrons - More electrons (higher the atomic number) = more orbitals - Shell Model: Simple but not quite accurate way of thinking about how electrons are distributed in orbitals in an atoms - You can tell if two atoms will interact by looking at the number of electrons in the outermost shell o Vacancies mean it might give up, gain, or share electrons under suitable conditions. o Inert atoms: atoms that show little tendency to enter into chemical reactions due to the lack to vacancy in their outermost shells o Atoms fill up vacancies in their ... Posted by: Margaret Rowden Limited version - please login or register to view the entire paper. |
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