CHEM 101 1nd Edition Lecture 1 Outline of Current Lecture I. General Class InformationII. Roots of ChemistryIII. Chemistry and the Scientific MethodIV. States of MatterV. Classification of Matter – Elements and DefinitionsVI. FormulasCurrent LectureI. General Class InformationII. Roots of Chemistrya. Alchemyi. Alchemy is an ancient practice focused on changing lead into gold.ii. Today, we still use methods but for different foci. III. Chemistry and the Scientific Methoda. The Scientific Method is an experimental science based on observation.b. Theory: a well tested, unifying principle that explains a body of facts.IV. States of Mattera. Solidsi. Are well understoodii. Have a rigid shapeiii. Particles are tightly packed and cannot move past each otherb. Liquidsi. Not well understoodii. Are fluid, and do not have a definite shapeiii. Particles can move past each otherc. Gasesi. Good theoretical understandingii. Takes the shape and volume of its containeriii. Particles move past each other very rapidlyd. All matter is in constant motion.e. As temperature increases, particles move faster.f. Different Levels of Matteri. Macrostopic – what we seeThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.ii. Particulate – what we cannot seeiii. Symbols – what we write on paperV. Classification of Matter – Elementsa. Molecule: an aggregate of at least 2 atoms in a definite arrangementb. Elementsi. Cannot be decomposed to other substancesii. 118 know as of 2011iii. Atom is the smallest formc. Compoundi. Contains 2 or more elementsii. Molecule Is the smallest formVI. Formulasa. Empiricali. Shows what’s present in what ratiosii. OHb. Moleculari. Most common formulaii. Shows elements and the number of each presentiii. H2O2c. Structurali. Most usefulii. Shows how the elements are bonded togetheriii. H – O – O –
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