Molecular Compounds Flashcards

1
Q

The Covalent Bond

A
  • non metals share electrons through covalent bond
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2
Q

diatomic molecules

A
  • have no fear of ice cold beer
  • never exist as single atom
  • H, O, F, Br, I, N, Cl
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3
Q

lewis Structures of Molecular Compounds

A
  • a moleulcar pair is conected by a dash when sharing electrons
  • all other non shared valance elctrons are shown
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4
Q

lone pair

A

none bonded pairs of electrons

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5
Q

covalent bond

A

pair of shared/bonded electrons

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6
Q

structural formula

A
  • only included covant bonds
  • no lone pairs
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7
Q
  1. lewis Structures of complex Molecular Compounds
A
  1. least electronegative atom= in middle
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8
Q

2.lewis Structures of complex Molecular Compounds

A
  1. all other atoms surround central atom
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9
Q
  1. lewis Structures of complex Molecular Compounds
A
  1. find total valance electrons of all atoms and find the charges of each
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10
Q
  1. lewis Structures of complex Molecular Compounds
A
  1. create covalent bonds for central atom and extra atoms go around remaining atoms
    - if remaining atoms are full, they can go on central atom
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11
Q
  1. lewis Structures of complex Molecular Compounds
A

if central atom is not full, you can take exltrons from remaining atoms and create double bond

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12
Q
  1. lewis Structures of complex Molecular Compounds
A
  • replace ectrons of covant bond with lines and create square bracket + charge
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13
Q

State at room temp.

A

Solid, liquid, or gas

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14
Q

Physical properties

A

soft, waxy, flexible, or crystalline

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15
Q

Relative melting/boiling point

A

Lower than ionic

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16
Q

Solubility in water

A

Some good, some poor

17
Q

Electrical conductivity as a solid

A

Low or none

18
Q

Ratios of Ionic vs. molecular compounds

A
  • There are millions of ionic compounds in a crystal
  • The properties are exactly the same (even 1 or 1 million)
  • This is not true for molecular
  • 1 molecular compound is not the same as 4 molecular compounds
  • It changes the formula (subscript)
19
Q

Electrical conductivity when dissolved in water (aqueous)

A

Low or none

20
Q

Ionic vs. Molecular Compounds Elements in compound

A

Ionic Compounds
metal + non metal

Molecular compound
non-metals

21
Q

Ionic vs. Molecular Compounds Ions created during formation

A

Ionic: Yes (electrons transferred)
Molecular: No (electrons shared)

22
Q

Ionic vs. Molecular Compounds Type of chemical bonds

A

Ionic: ionic bond
Molecular: covalent

23
Q

Ionic vs. Molecular Compounds Bulk structure

A

Ionic: Crystal lattice
Molecular: Separate molecules

24
Q
A