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27 Cards in this Set
- Front
- Back
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what is ionic bonding? particles? attraction?
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between a metal and non metal.
- ions -ionic bonds. |
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what is convalent? Network... particles? attraction?
Molecular... particles? attraction? |
between metal and non metal
N: p: atoms a: convalent bond M: p: particles a: weak intermolecular forces |
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metalic bonding? particles? attraction?
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bonding between metal atoms. atoms. metallic bonds.
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metallic bonds?
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attraction between loosely held valence electrons and positively charfed nuclei of neighbouring atoms
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ionic bonds?
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electrostatic attraction between oppositely charged ions
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convalent bonds?
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bind in which one or more pairs of electrons are shared by two atoms (intramolecular)
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what is intermolecular?
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weak attraction between molecules
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electrical conductivity needs? when can ions conduct?
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they NEED free delocalised electrons to conduct electricity. ions can only conduct in molten state.
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what does hardeness indicate?
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STRONG METALLIC, CONVALENT OR IONIC BOND- much energy is needed to overcome
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what does brittle indicate?
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ionic bond (like charges line up and repel)
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what does a high mp and bp indicates?
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strong attraction between atoms or ions
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what does malleable/ductile indicates?
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non-directional attraction due to mettalic bond
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can conduct electricity?
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has free delocalised electrons
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non polar substances dissolves in...
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polar substances due to weak intermolecular forces
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polar and ionic solvents dissolve in...
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polar substances due to attraction between charged particles
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linear?
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no lone electrons, two regions, 180°
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Bent?
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2 regions, has lone electrons 120° or 109°
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triagonal planar?
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three regions, no lone pairs 120°
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triagonal pyramid?
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3 regions, has lone pairs (109°)
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tethahedral?
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4 regions, no lone pairs 109°
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what is electronegativity?
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how strongly an atom wants electrons
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polar molecules?
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asymmetrically, polar bonds do not out
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non polar?
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symmetrical, polar bonds cancel out
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endothermic?
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energy absorbed from surrounding
products have more energy than reactants enthalpy is positive bond breaks |
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exothermic
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energy is released
products have less energy than the reactants enthalpy is negative bonds are made |
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enthalpy graphs... what are the 4 things you need to include?
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activation energy with arrows
reactants used products formed enthalpy with arrows and + or - |
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how do you calculat change in enthalpy?
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bonds broken-bonds formed
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