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Chem 20 > Bonding > Flashcards

Bonding Flashcards

1
Q

Types of bonds

A

Ionic and covalent

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2
Q

Ionic bonds

A

Found in ionic compounds, electrons are transferred (stolen), bond occurs between ions

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3
Q

Covalent bonds

A

Found in molecular compounds, electrons are shared between two atoms, octet rule

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4
Q

Octet rule

A

Atoms are stable when they have a full valence shell

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5
Q

Exception to octet rule

A

Boron(6) hydrogen(2) and helium

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6
Q

Covalent and ionic compounds are both

A

Intramolecular bonds

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7
Q

Lewis diagram or electron dot diagrams

A

Octet rule

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8
Q

Lewis diagram rule 1

A

Count total number of valence electrons for molecule

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9
Q

Lewis diagram rule 2

A

Write central atom first

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10
Q

Lewis diagram rule 3

A

Attach remaining elements around central element as symmetrical as possible using a pair of electrons

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11
Q

Lewis diagram rule 4

A

Any remaining electrons are placed around outside atoms

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12
Q

Lewis diagram rule 5

A

Remaining electrons are placed on central atom

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13
Q

Lewis diagram rule 6

A

If octets are still not full, share pairs

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14
Q

Lewis diagram rule 7

A

If it’s charged, put brackets outside with charge

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15
Q

VSEPR theory

A

Valence shell electron pair repulsion

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16
Q

VSEPR shape 1

A

Linear, central atom has 0 line pairs and 2 bonding groups

17
Q

VSEPR shape 2

A

Bent/ v shaped, central atom must have 2 lone pairs and 2 bonding groups

18
Q

VSEPR shape 3

A

Trigonal planar, central atom must have 0 lines pairs and 3 bonding groups

19
Q

VSEPR shape 4

A

Trigonal pyramidal, central atom must have 1 lone pair and 3 bonding groups

20
Q

VSEPR shape 5

A

Tetrahedral, central atom must have 0 lone pairs and 4 bonding groups

21
Q

Electronegativity

A

A number that describes the ability of an atom to attract a pair of bonding electrons in its valence level

22
Q

Polar bonds

A

The difference is greater than 0.4

23
Q

Non polar bonds

A

Polar is 0.4 or less

24
Q

Polar bonds exist when?

A

Electrons are shared unequally

25
Q

Non polar bonds exist when?

A

Electrons are shared equally

26
Q

Intramolecular bonds

A

Ionic (stealing)
Covalent (sharing)

27
Q

Covalent bonds

A

Polar
Non polar

28
Q

Intra

A

Within

29
Q

Inter

A

Between

30
Q

Intermolecular forces

A

Hold one molecule to another

31
Q

3 types of IMFs

A

LDF, DD, HB

32
Q

LDF

A

Temporary attraction between two atoms, in all molecules
More electrons the higher the LDF

33
Q

DD

A

Permanent attraction, all polar molecules

34
Q

HB

A

Hydrogen attached directly to either a nitrogen, oxygen or fluorine, has to be polar

Chem 20 (7 decks)

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