Lecture Outline 8_25-8_27

Lecture Outline 8_25-8_27 - 2 Basic chemistry Reading...

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Basic chemistry Reading assignment: Chapter 2, pages 30–45. Elements, Compounds Atoms Elements that make up living organisms Composition of atoms (subatomic particles) Nucleus: protons and neutrons Electrons Atomic number Atomic mass Chemical Symbols Subatomic particles: electrons and protons are charged Ions Isotopes Placement of electrons in an atom (orbitals) Valence shell, valence electrons, valence (bonding capacity) Molecules Chemical bonds: Covalent bond Non polar vs. polar covalent bonds Ionic bond Hydrogen bond GLOSSARY Matter: Anything that takes up space and has mass. Element: Any substance that cannot be broken down to any other substance. Compound: A chemical combination, in a fixed ratio, of two or more elements. Atom: The smallest particle of an element that retains the properties of the element; composed of a central nucleus, which contains protons and neutrons, and outer orbitals, which contain electrons. Subatomic particles:
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Lecture Outline 8_25-8_27 - 2 Basic chemistry Reading...

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