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Adv. chem unit 3
Term | Definition |
---|---|
covalent bonding | nonmetal to nonmetal, shared electrons, low melting and room temperature boiling points, liquids and gases at room temp, weak bonds, does not conduct electricity, insoluble in water, electron orbitals overlap |
formation of cations | lose electrons, makes positive ion, metals like to be cations |
formation of anions | gain electrons, makes negative ion, name typically ends with ide |
formation of ionic compounds | must be neutral, charge is zero, positive charge cancels negative charge, opposites attract, force of attraction is electrostatic force |
properties of ionic compounds | crystalline solids, high melting points, brittle, made of metal and nonmetal, conductive |
metallic bond | attraction between metal cations and the surrounding sea of electrons, empty p and d orbitals allow electrons to move freely, valence electrons do not belong to any one atom, |
Ionic bonding | metal bonded to nonmetal, metal bonded to poly atomic ion, total transfer of electrons, high melting and boiling point, solids at room temp, strong bonds, electrically reactive, soluble in water, electron orbitals are seperate |
VESPR (valence shell electron repulsion) | electrons will arrange themselves to minimize repulsion, bond angle: angle between the bonds connecting atoms in a molecule |
dipoles and molecular polarity | net dipole:polar, dipoles cancel: nonpolar, |
IMF (general) ((intermolecular force)) | force of attraction, holds groups of molecules together, also known as van der Waal's forces |
states of matter determined by forces | weak forces=gas low boiling point, strong= solid or liquid, high BP |
Dispersion force | all molecules have it, more electrons=more dispersion, weakest force |
dipole-dipole | stronger than dispersion, all polar molecules |
hydrogen bonds | not a bond, polar molecules with H and N, O, or F |