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Chemistry 2022-23 > Chemical Bonding > Flashcards

Chemical Bonding Flashcards

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1
Q

Electronegativty for non-polar

A

0-0.4

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2
Q

Electronegativity for polar

A

0.5-2.4

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3
Q

Electronegativity for ionic

A

Above 2.4

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4
Q

How many degrees is linear?

A

180

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5
Q

How many degrees is trigonal planar?

A

120

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6
Q

How many degrees is tetrahedral?

A

109.5

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7
Q

How many degrees is trigonal pyramidal?

A

About 105-109.5

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8
Q

How many degrees is bent?

A

About 105-109.5

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9
Q

Linear molecules are usually _____

A

Nonpolar

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10
Q

H2O is _____

A

Polar, bent

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11
Q

Nonpolar molecules are usually ____

A

Symmetrical

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12
Q

Two identical polar vonds in opposite directions will cancel

A

Nonpolar

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13
Q

Two polar bonds eith an angle of less than 180 between them will not cancel

A

Polar

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14
Q

Three identical polar bonds at 120 from each other will cancel

A

Nonpolar

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15
Q

Four identical polar bonds un a tetrahedral arrangement (109.5 from each other) will cancel

A

Nonpolar

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16
Q

Three polar bonds in a trigonal pyramidal arrangement (109.5) will not cancel

A

Polar

17
Q

In all cases where the polar bonds cancel the bonds are assumed to be identical. True of false?

A

True

18
Q

If one or more of the bonds are different than the other(s) the bonds will not cancel

A

Polar

19
Q

When the bonds cancel eachother out they are polar. True or false

A

False

20
Q

A bond is ___ if the two bonding atoms have different electronegativities

A

Polar

21
Q

If there are not polar bonds the molecule is ____

A

Nonpolar

22
Q

Polar and nonpolar molecules depend on 2 factors which are what?

A

Symmetry of shape and bond polarity

23
Q

Molecules without positive and negative side. Polar or nonpolar?

A

Nonpolar

24
Q

Asymmetrical ex. Bent. Polar or nonpolar?

A

Polar

25
Q

Molecules with a positive and negative side (dipole). Polar or nonpolar?

A

Polar

26
Q

Symmetrical or the same on their exterior. Polar or nonpolar?

A

Nonpolar

27
Q

Always polar shapes are…

A

Bent, trigonal pyramidal

28
Q

Depending on symmetry, usually nonpolar shapes are…

A

Tetrahedral, linear, trigonal planar

29
Q

Causes of polarity (4)

A

Asymmetrical, unshared electrons on the center atom, polar bonds (which isn’t always true tho), outside is different from the other

Chemistry 2022-23 (3 decks)

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