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Year 11 Chem Bonding Test > Polar Bonds > Flashcards

Polar Bonds Flashcards

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1
Q

What is the relationship between the number of electrons in a molecule and dispersion forces?

A

The greater the number of electrons in a molecule, the greater the dispersion forces

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2
Q

What are the layers in graphite held together by?

A

Dispersion forces

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3
Q

What is the trend of boiling points of noble gases?

A

The boiling point of noble gases increases down a group due to increasing dispersion forces

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4
Q

Does graphite conduct?

A

Yes, it is a good conductor of heat and electricity

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5
Q

What is an example of intermolecular hydrogen bonding?

A

HF

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6
Q

What is the shape of a water molecule?

A

V-Shape

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7
Q

Why is CCl2H2 an overall polar molecule?

A

It is tetrahedral in shape and H and Cl have different electronegativity

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8
Q

What are homonuclear molecules?

A

Formed from atoms of the same element and are non-polar

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9
Q

What are heteronuclear molecules?

A

Formed from atoms of different elements and are polar

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10
Q

What does a polar bond refer to?

A

The end of the atom with the greater electronegativity will have a permanent negative charge because the shared pair of electrons spends more time nearer this atom.
The other end of the bond will have an equal positive charge

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11
Q

What is molecular polarity?

A

The combination of all the bond polarities in a molecule

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12
Q

What does positive bond polarity refer to?

A

Atoms with lower electronegativity in a molecule

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13
Q

What does negative bond polarity refer to?

A

Atoms with higher electronegativity in a molecule

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14
Q

What is electronegativity?

A

The ability of an atom to attract electrons towards itself in a bond

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15
Q

What is an atoms electronegativity affected by?

A

The atomic number and the distance of its valence electrons from the charged nucleus

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16
Q

What is core charge?

A

The force of attraction between a nucleus and valence electrons, which increases across a period

17
Q

How is core charge calculated?

A

Number of protons in the nuclues - number of total inner-shell electrons

18
Q

What is a dipole?

A

A pair of equal and oppositely charged poles separated by a distance

19
Q

What is a permanent dipole?

A

The partial charge separation that can occur within a molecule along the bond that forms between two different atoms

20
Q

What is a polar bond?

A

A covalent bond where there is an electronegativity difference between the bonded atoms and they are asymmetrical

21
Q

What is a non-polar bond?

A

A covalent bond between 2 non-metal atoms that have the same electronegativity and are symmetrical

Year 11 Chem Bonding Test (6 decks)

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