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Chemisty > Bonding > Flashcards

Bonding Flashcards

0
Q

Electronegativity _____ from left to right going across a period on the periodic table.

A

Increases

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1
Q

What is the definition of electronegativity?

A

Attraction for electrons in a bond

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2
Q

What element has the highest electronegativity?

A

Fluorine

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3
Q

What element has the lowest electronegativity?

A

Francine (Fr)

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4
Q

A nonpolar covalent bond occurs between..

A

Two nonmetals

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5
Q

What kind of sharing happens in nonpolar covalent bonds?

A

Equal or almost equal sharing of electrons

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6
Q

Between what numbers is the electronegativity difference in nonpolar covalent bonds?

A

0 - 0.4

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7
Q

A polar covalent bond occurs between..

A

Two nonmetals

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8
Q

What kind of sharing occurs between polar covalent bonds?

A

Unequal sharing

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9
Q

Between what numbers is the electronegativity difference in polar covalent bonds?

A

0.5 - 1.7

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10
Q

Ionic bonds occur between..

A

A metal and a nonmetal
Metal to polytomic ions
Polytomic ions to polytomic ions

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11
Q

Ionic bonds is a result of..

A

Electron transfer

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12
Q

Ionic bonds have an electronegativity of..

A

1.7 and up

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13
Q

Elements in the upper right side of the periodic table have ___ electronegativity, elements in the lower left side have ___ electronegativity.

A

High, Low

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14
Q

Ionic bonds have a ___ melting point.

A

High

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15
Q

Are ionic bonds soft or hard?

A

Hard

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16
Q

Ionic bonds ____ conduct electricity in the solid phase

A

do not

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17
Q

When looking for an element with the highest ability to attract electrons look for..

A

The element with the highest electronegativity

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18
Q

Molecular = ?

A

Covalent

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19
Q

In a polar covalent bond, electrons are drawn to the ____ electronegative atom.

A

more

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20
Q

Covalent bonds have a ___ melting point.

A

Low

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21
Q

Are covalent bonds soft or hard?

A

Soft

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22
Q

Covalent bonds ___ conduct electricity.

A

do not

23
Q

What are the shapes of a symmetrical bond?

A

A tetrahedron and a line

24
Q

What two compounds are tetrahedrons?

A

CCl4 and CH4

25
Q

What compound forms a symmetrical line?

A

Carbon Dioxide

26
Q

When thinking of metallic bonds think…

A

Sea of mobile electrons

27
Q

Metallic bonds occur between..

A

Two metals

28
Q

Define a network solid

A

COVALENTLY BONDED MACROMOLECULES

29
Q

What are the three important network solids?

A

Diamond C
Silicon Dioxide (Sand) SiO2
Silicon Carbide SiC

30
Q

Are network solids soft or hard?

A

VERY HARD

31
Q

If a compound is symmetrical it automatically becomes…

A

Nonpolar

32
Q

Network solids are a strong network of _____ bonds

A

Covalent

33
Q

Network solids have a _____ melting point.

A

Very high

34
Q

Network solids ___ conduct heat or electricity.

A

do not

35
Q

The three intermolecular forces are…

A

LDF (London Dispersion Forces), Dipole-Dipole, and Hydrogen bonding

36
Q

Intermolecular forces are not..

A

bonds

37
Q

Attractions BETWEEN molecules of covalent compounds are…

A

Intermolecular forces

38
Q

A stronger IMF means a ___ melting point and ___ vapor pressure.

A

Higher, higher

39
Q

Weaker IMF means a ___ melting point and boiling point, ___ vapor pressures.

A

Low, high

40
Q

LDF is the ___ IMF

A

weakest

41
Q

LDF occurs between what type of molecules?

A

Nonpolar

42
Q

Greater numbers of electrons cause a____ shift and ____ LDF

A

greater, stronger

43
Q

As you go ____ the group, elements have more electrons, stronger LDF

A

down

44
Q

Stronger than LDF but weaker than hydrogen bonding.

A

Dipole-Dipole

45
Q

Dipole-Dipole occurs between…

A

Polar molecules

46
Q

____ is the strongest IMF

A

Hydrogen bonding

47
Q

Hydrogen bonding occurs between ___ molecules containing hydrogen

A

VERY POLAR

48
Q

For hydrogen bonding remember…

A

e- NOF

49
Q

For hydrogen bonding remember these three compounds

A

NH3, H2O, and HF

50
Q

The more electrons an element has the ___ the molecular size is.

A

bigger

51
Q

Normal boiling point is the point at which the the compound or element boils at ____ pressure.

A

normal

52
Q

Strong IMF means ___ vapor pressure and ___ boiling point

A

low, high

53
Q

Weak IMF means ___ vapor pressure and ____ boiling point.

A

high, low

54
Q

F2 is a __ and I2 is a___

A

gas, solid

Chemisty (2 decks)

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