CH 304K 1st Edition Lecture 6 Outline of Last Lecture I. Physical and Chemical Changes, Introduction to Atoms and elements, Intro to periodic tableOutline of Current Lecture II. Naming Compoundsa. Ionicb. MolecularIII. Energy and Matter LawsIV. StoichiometryCurrent LectureMolecular Compounds- Formed from two elements on the right side of the periodic table- Naming binary molecular compounds:o Write first element as it appears on periodic tableo Second element change name to end in “-ide”o If there is more than one atom in either, add prefix (“di” for 2, “tri” for 3, etc.)o Don’t use “mono” for the prefix for the first element if there is only oneo Example: Dinitrogen tetroxide= P2O5Ionic Compounds- Formed from one element from the right side and one from the left side of the periodic table- Naming binary ionic compoundso Write the most metallic element firsto Write the least metallic element nextThese 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.o Change name to end in “-ide”o If the metal is a transition metal, a roman numeral gives the charge on the ionLaw of Conservation of Matter: In any chemical or physical change, the total amount of matter isconstantLaw of Conservation of Energy: In any chemical or physical change, the total amount of energy isconstant; it may be converted to another formLaw of Conservation of Energy and Matter: the combined amount of energy and matter in the universe is fixed- Matter can be converted to energy E=mc2Stoichiometry- Writing and balancing chemical equations- Reactants to products- Use coefficients to keep the equation balanced- No one method works in all circumstances for balancing equations- Leave elements or diatomic elements for last- Adding a coefficient in front of a compound multiplies all elements in that
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