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Lernen beginnen

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Frage		Antworten
enthalpy Lernen beginnen		energy required to break the bond
Intermolecular forces Lernen beginnen		- permanent dipole-dipole interaction - induced dipole - dipole forces - London forces
Dipole-dipole forces Lernen beginnen		- different or same molecules. - permanent
Hydrogen bonds Lernen beginnen		very strong, NOT Van der Waals, 2 conditions (the electonegative element must have at least one lone pair, hydrogen atom must be attached to a highly electronegative atom)
London forces Lernen beginnen		- weak and only for a second - 17 and 18 group mostly
covalent bond Lernen beginnen		electrostatic force of attraction between the shared pairs and the positively charged nuclei
ligands Lernen beginnen		te atomy z boku
lattice enthalpy Lernen beginnen		energy required to break one mole of a solid compound into ions in the gas phase
Ions Lernen beginnen		not volatile (nie lotne), in solid state they don't conduct electricity, in liquid yes, soluble mostly
the lower the ia Lernen beginnen		the weaker the compound
Formal charge Lernen beginnen		=n wal - 1/2 bond - wolne electr
hybridization Lernen beginnen		sp3 - sigma bonds, sp2 - pi bond, trigonal planar, sp3 - two pi bonds, linear
Metalic bond Lernen beginnen		force of electrostatic attraction between the lattice of cations and demoralized electrons
the smaller and more positive the ion Lernen beginnen		the stronger the bond
high melting point Lernen beginnen		strong metal
bonding triangle Lernen beginnen		average and delta
alloys might have different properties Lernen beginnen		different packaging of the cations in the lattice
alloys are Lernen beginnen		stronger more resistant to corrosion
steel Lernen beginnen		iron and carbon
bronze medal Lernen beginnen		copper and sn (tin)
brass Lernen beginnen		copper zinc

Chemia TEST

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