CHEM 105N 1st Edition Lecture 17 Outline of Last Lecture I. Positron EmissionII. Gamma RadiationIII. Radioactive IsotopesIV. Radiation MeasurementsV. Half LifeVI. Decay CurveVII. Calculating Half LivesVIII. Nuclear FissionIX. Nuclear FusionOutline of Current Lecture I. Chemical BondsII. The Octet RuleIII. Ionic & Covalent BondsCurrent LectureI. Chemical Bonds:- Chemical Bonds are forces of attraction between atoms- Bonding attraction comes from attraction between protons and electrons- This chemical bonding forms compoundsEx.Hydrogen Peroxide Molecule: H O O HII. The Octet Rule:- When atoms form a chemical bond, it is common for them to end up with EIGHT electrons in their valence shell- Atoms form octets to by losing/gaining/sharing electrons- They are formed so that the atoms become more stable- Octets are formed when ionic/covalent bonds are formedIII. Ionic & Covalent Bonds:- Ionic Bond Metal + Nonmetal These 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.- (opposites attract)- Metal atoms transfer electrons to nonmetal- Ionic Compounds are the product of ionic bonding- Covalent Bond Nonmetal + Nonmetal - (like atoms)- Nonmetals share valence electrons- Covalent Compounds are the product of covalent
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