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ADV CHEM
Unit 4 quiz 11/30
| Question | Answer |
|---|---|
| metallic bonding | chemical bonding resulting from the attraction between metal cations and the surrounding sea of electrons |
| characteristics of metals bc of the electron's ability to move freely | high conductivity, high boiling point, malleable |
| intermolecular forces | the forces of attractions between molecules |
| types of intermolecular forces | dipole- dipole, hydrogen bonds, london forces |
| the higher the boiling point | the stronger the forces are between particles |
| how do boiling points for ionic compounds and metals compare with the boiling points for molecular compounds | ionic and metal compounds have a lower boiling point than molecular compounds |
| where do strong intermolecular forces occur | between polar molecules |
| dipole-dipole forces | forces of attractions between polar covalent molecules |
| what does hydrogen bonding do | makes compounds such as hydrogen fluoride, water, and ammonia to have unusually high boiling points |
| when do london dispersion forces occur | always |
| london dispersion forces | the intermolecular attractions resulting from the constant motion of electrons and the creation of instantaneous dipoles |
| when does hydrogen bonding occur | when H is bonded with F, O, or N |
| when do london forces occur | dipoles that are non polar |
| which one is stronger. Intermolecular or Intramolecular | intramolecular |
| how do you tell which mol has a stronger intermolecular force | the higher the boiling point, the stronger the force |
| VSEPR Theory acronym | Valence Shell Electron Pair Repulsion |
| What does VSEPR Theory do | predicts the shape of a bonded molecule |
| shapes for molecules with only bonded electrons | linear, trigonal planar, tetrahedral |
| linear | 2 atoms attached to the center atom |
| linear bond angle | 180 |
| linear structure | AB, AB2 |
| trigonal planar | 3 atoms attached to center atom |
| trigonal planar bond angle | 120 |
| trigonal planar structure | AB3 |
| tetrahedral | 4 atoms attached to the center atom |
| tetrahedral bond angle | 109.5 |
| tetrahedral structure | AB4 |
| Shapes for molecules with lone and bonded pairs | Trigonal pyramidal, bent |
| trigonal pyramidal | 3 atoms attached to center atoms 1 lone pair |
| trigonal pyramidal bond angle | 107 |
| trigonal pyramidal structure | AB3E |
| bent | 2 atoms attached to the center atom 2 lone pairs |
| bent bond angle | 104.5 |
| bent structure | AB2E2 |
| symmetrical molecules | non polar |
| non symmetrical molecules | polar |
| intermolecular forces strongest to weakest | hydrogen bonding, dipole- dipole, london forces |
Created by:
stella_koe
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