by reid janssen and ryan miller. forces within bonding intramolecular and intermolecular forces...
TRANSCRIPT
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Types of BondingBy Reid JanssenAnd Ryan Miller
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Forces within BondingIntramolecular and Intermolecular forces Intermolecular
forces are attraction between neighboring molecules intramolecular forces are attraction within molecules chemical bonds.
Dipole-Dipole attraction Attraction between molecules that are dipoles.
Van der waals forces Are weak intermolecular attraction that exist but one molecule and another whether polar or non-polar.
The London dispersion force is the weakest intermolecular force. It’s a temporary attractive force that results when the electrons in two atoms occupy positions that make the atoms form temporary dipoles
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Covalent BondingCovalent bonding is the bond between two non-metals.Such a bond exists when two or more non-metals come
together and share electrons to satisfy the octet rule, which states that each atom must have a total of 8 electrons on it’s valence shell.
The electrons within covalent bonds are shared, neither atom gives or takes the others electron.
There are two branches of covalent bonding, non-polar and polar.
In covalent polar bonds the atoms within the bond are all sharing the electrons unequally. Ex: HCl
In covalent non polar bonds the electrons are shared equally, this only consists within the atoms of the same element. Ex: F₂
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Drawing Covalent BondsTo draw covalent bonds, we use the electron
dot diagram. Ex: HCl F2
HCl F F
Covalent polar bond
Covalent non-polar
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Ionic BondingIonic bonding is the bond between a metal and a non-metal.Non-metals are usually negative and metals are usually
positive, when one negative non-metal and a positive metal join together they form a ionic compound.
In an Ionic bond the metal (unless its an ion) will always give up its electrons to the non-metal in order to satisfy the octet rule.
Ions are formed when neutral atoms either gives up or gains a valence electron.
The loss of electrons from a metal atom makes a positive ion.The gain of electrons by a non-metal give a negative ion.If a metal such as sodium losses two electrons it will act as a
non-metal in the halogen family.
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Drawing Ionic BondingElectron dot diagrams
Na
+ Cl = Na
+ - ClIonic bond
S 2e
S+ -2-
[ ]Sulfur Ion
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Hydrogen BondingThe strong
intermolecular attraction between the nucleus of a hydrogen atom, covalently bonded to an atom of a highly electronegative element such as oxygen, nitrogen, or fluorine (all halogens). A common example of this is H₂O (water)