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METALLIC BONDING, WEAK INTERACTIONS, attraction btwn molecules are always…
METALLIC BONDING
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Definition
The electrostatic attraction btw the cloud of negative electrons and the positively charged nuclei of metal atoms holds the atoms together.
Valence electrons of metal atoms are neither shared nor donated but they are free to move -> these e's form a cloud of - charge / the electron sea
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metals have empty orbitals> low ionization energy> valence electrons pulled very weakly to the nuclei
many metal atoms pull their valence electrons to form a delocalized electron sea that holds the metal ion cores (çekirdek) together
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WEAK INTERACTIONS
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Hydrogen Bond
Effect on physical state of matter: substances forming h-bonds have very high boiling points since hydrogen bond is the strongest of the Van Der Waal Forces / stronger the bond higher the energy required to break the bond
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-polar molecules tend to dissolve readily in polar solvents, water is both polar and able to form h-bonds (that's why polar molecules tend to be soluble in water)
only H can make this bond with the atoms N, O and F. It is the STRONGEST WEAK FORCE! (polar...polar bond)
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