CH 101 Lecture Notes - Lecture 5: Ionic Compound, Formula Unit, Electron Configuration
Document Summary
H h: compounds two types of elements. Chemical formula: specifies the elements contained in a compound and the relative ratios of atoms, molecular formula (mf) gives the actual number of each elements in 1 molecule of the compound or ions. (cid:2870)(cid:1841)(cid:2870) : molecular formula for hydrogen peroxide. H o o h. Lowest whole number ratio of elements in a compound: structural formula uses lines to represent bonds with atoms, empirical formula. Chemical symbol represents the core electrons: lewis structure forming bonds between atoms. Bonds are formed between atoms using valence electrons. Non-bonding electrons (lone pairs) electrons belong to 1 atom in the molecule, not shared. Bonds: atoms trying to achieve a noble gas electron configuration. Noble gases 8 valence electrons (except he: 2 valence electrons) Atoms are trying to achieve an octet (8 valence electrons) by forming bonds. Sharing electrons covalent bonds molecular compounds (two nonmetal elements or metalloid and nonmetal element) Ionic bonds are not directional: formula units.