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20 Cards in this Set
- Front
- Back
Network Solid
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a solid in which all of the atoms are covalently bonded to each other
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Resonance structures
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(can be reversed/ reversely drawn)
-are structures that occur when it is possible to draw two or more valid electron dot structures that have the same number of electron pairs for a molecule or ion. |
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Dispersion forces
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between non polar forces (like Carbon Tetra Chloride CCl4) the molecule doesn’t have a pole but it has a temporary charge after moving around all the time there will be a moment in time in that moment it will have a partially negative charge
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Molecular Formula
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An expression which states the number and type of atoms present in a molecule of a substance.
like C6H14 |
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Structural Formula
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a chemical formula that shows the arrangement of atoms in a molecule or a polyatomic ion
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Triple Covalent Bond
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a bond formed by sharing three pairs of electrons
one is sigma the other two are pi |
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Dispersion Force
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attractions between molecules caused by the electron motion on one molecule affecting the electron motion on the other through electrical forces; these are the weakest interactions between molecules
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Double Covalent Bond
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a bond that involves two shared pairs of electrons
one is a sigma bond and the other is a pi bond |
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Coordinate Covalent Bond
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a covalent bond in which one atom contributes both bonding electrons
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Non Polar Covalent Bond
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a covalent bond in which the electrons are shared equally by the two atoms
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A dipole
Dipole forces |
-a molecule that has two poles, or regions with opposite charges
-intermolecular forces resulting from the attraction of oppositely charged regions of polar molecules |
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dipole interactions
Dipole interactions are similar & weaker than... |
The attractions between opposite poles of polar molecules
di (two) poles dipole -ionic bonds |
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bond dissociation energy
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the amount of energy required to break a covalent bond between atoms
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VSEPR theory
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states that because electron pairs repel, molecules adjust their shapes so that valence-electron pairs are as far apart as possible
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Hydrogen bonds can create very strong intermolecular forces when they are bonded to atoms that are very electronegative like...
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oxygen, nitrogen, and flourine
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When LIKE atoms are joined by a covalent bond, the bonding electrons are shared equally and the bond is...
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non polar covalent
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In general, the electronegativity values of nonmetallic elements are greater than the electronegativity values of...
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metallic elements
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A polar molecule
polar covalent bond (polar bond) |
-a molecule in which one side of the molecule is slightly negative and the opposite side is slightly positive
-a covalent bond between atoms in which the electrons are shared unequally |
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Hydrogen bonds
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attractive forces in which a hydrogen covalently bonded to a very electronegative atom is also weakly bonded to an unshared electron pair of another electronegative atom
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Describe a network solid and give two examples
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Solids that consist of molecules that very stable and tend to not melt until the temperature reaches 1000*c or higher are known as network solids or network crystals. Network solids contain atoms that are all covalently bonded to each other. The only way a network solid can be melted is if all of the covalent bonds must be broken throughout the solid, but even then, the solid wont melt. Like diamond, rather than melting, it vaporizes into a gass at 3400*C and above rather.
C (diamond)-a form of pure carbon- SiO2 (quartz)-silicon dioxide- the solid is an extended three-dimensional network of ...-Si-O-Si-O-... bonding. Diamond is a network solid consisting of carbons that are interconnecting and covalently bonded throughout the molecule. Quartz is another example of a network solid. Quartz or silicon dioxide (SiO2) is a stone (like diamond) that is composed of an extended 3 dimensional network of …Si-O-Si-O… bonding. |