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11 Cards in this Set
- Front
- Back
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Relative atomic mass |
The relative atomic mass, Ar is the weighted mean mass of an atom compared with 1/12th of the mass of an atom of carbon-12 |
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Relative isotopic mass |
The relative isotopic mass is the mass of an atom of an isotope compared with the mass of 1/12th an atom of carbon-12 |
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Ionic bond |
Ionic bonding is the electrostatic attraction between positive and negative ions. It holds together cations and anion in ionic compound. |
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Covalent bond |
Covalent bonding is the strong electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atom.
Covalant bonding occurs between : -Non-metallic elements -Compound of non metallic elements -polyatomic ions
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Hydeogen bond
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A strong dipole-dipole interaction between an electron deficient hydrogen atom of -NH, -OH or HF on one molecule and a lome pair of electrons on hoghly electronegative atom containing N, O or Fon diffrent molecule |
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First ionisation energy |
The energy required to remove one electron from each atom in one mole of gaseous atoms of an element to form one mole of gaseous 1+ ions. |
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Group |
A vertical column in the periodic table. Elements in a group have similar chemical properties and their atoms have the same number of outershell electrons |
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Induced dipole-dipole interaction |
Attractive forces between iduced dipole in diffrent molecules ; also called london forces |
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Standard state |
The physical state of a substamce under stamdard conditions of 100kpa and stated tempreture of 298k |
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Avagadros constant |
6.02×10^2 the number of atoms per mole of carbon |
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Activation energy |
The minimum amount of energy required to start a reaction by breaking the bonds |
