Molecules: Shapes & Forces (AQA A-Level Chemistry): Flashcards
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Practise the cards
10 cards from this deck
What is electronegativity?
What is electronegativity?
Atom's ability to attract shared electrons in a covalent bond
How does electronegativity change across a period?
How does electronegativity change across a period?
Increases from left to right
How does electronegativity change down a group?
How does electronegativity change down a group?
Decreases due to increased radius and shielding
Most electronegative element and its Pauling value
Most electronegative element and its Pauling value
Fluorine (F), value of 4.0
Non-polar covalent bond characteristic
Non-polar covalent bond characteristic
Equal/similar electronegativity, electrons shared equally
Polar covalent bond characteristic
Polar covalent bond characteristic
Significant electronegativity diff., unequal electron sharing
Which atom gets in a polar bond?
Which atom gets in a polar bond?
The more electronegative atom
What is a permanent dipole?
What is a permanent dipole?
Molecular dipole when bond dipoles don't cancel due to shape
Electronegativity difference for polar covalent bonds
Electronegativity difference for polar covalent bonds
0.5 – 1.7
Why molecules with polar bonds can be non-polar overall
Why molecules with polar bonds can be non-polar overall
Symmetrical shape causes dipoles to cancel out