CHEM 1021 Lecture Notes - Lecture 3: Nonmetal, Chemical Compound, Ion
Document Summary
Chemical compound - 2 or more different elements chemically joined by a bond. Chemical bonds as a transformation of matter (new substances created) Electron-level interactions alter electron ownership, forming chemical bonds. Ionic bonds - result from electron transfer from one atom to another, mutual attraction between newly formed cation (+) and anion (-), found in ionic compounds, form between metals and nonmetals. Covalent bonds - result from electrons being shared between 2 or more atoms, mutual attraction between the nucleus (+) and the electrons (-), form between nonmetals and nonmetals. Found in molecular compounds (ie. ionic bonds in group 1a) Ionic bonds as formed due to the electrostatic interactions (forces) between cations and anions. Electrostatic forces - attraction and repulsion between ions ie. nacl (solid) yields na+ (positive, aqueous, metal) and cl (negative, aqueous, nonmetal) Crystalline array of alternating cations and anions (found in ionic substances)
