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PPAR > FORCES OF ATTRACTION > Flashcards

FORCES OF ATTRACTION Flashcards

1
Q

Knowledge of these molecular forces and their equilibrium is
important in understanding the:

A
  1. properties of gases, liquids, and gases
  2. interfacial phenomena
  3. flocculation in suspensions
  4. stabilization of emulsions
  5. compaction of powders in capsules
  6. dispersion of powders or liquid droplets in aerosols
  7. compression of granules to form tablets
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2
Q

aggregate to form molecules and
lattices.

A

Atom

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3
Q

aggregate to form
condensed phases of matter.

A

Molecules

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4
Q

The aggregation of atoms, appositively
charged ions, and molecules are a consequence
of _______ exerted on the electrons of
one particle by the nucleus (or nuclei) of the
other.

A

electrical forces

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5
Q

There are 2 types of attraction in molecules:

A

intramolecular & intermolecular forces of
attraction

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6
Q

anything related to drug attraction

A

Forces of Attraction in Pharmacy

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7
Q

is the strongest among molecular forces; irreversible; permanent binding

A

Covalent Bonding

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8
Q

surface tension

A

Repulsion

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9
Q

tensions within the surface

A

Interfacial tension

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10
Q

aggregation, implying for emulsions

A

Floccule

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11
Q

Atoms subunits

A

Proton, electrons, neutrons

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12
Q

forces that exist within
molecules or
fundamental/formula
units (forces that hold
atoms or ions in a
compound).

A

Intramolecular

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13
Q

forces of attraction that
exist between the
molecules in a
compound.

A

Intermolecular

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14
Q

Electrostatic force of attraction between
ions of opposite charge .

A

Ionic or Electrovalent Bond

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15
Q

Formed between atoms with a small difference in
electronegativity.

A

Covalent Bonds

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16
Q

Positive ions surrounded by a sea of mobile
(delocalized) electrons. Strong electrostatic force of attraction binds the
system together

A

Metallic Bonds

17
Q

is a type of chemical bond formed through
an electrostatic attraction between two oppositely
charged ions.

A

Ionic Bond

18
Q

Ionic bonds are formed between a cation, which is
usually a ____, and an anion, which is usually a _______.

A

metal

nonmetal

19
Q

Transfer of electrons between a non-metal and metal

A

IONIC BOND

20
Q

Properties of Ionic or Electrovalent Compounds

A

o Crystalline solids- rigidity and strength
o High melting and boiling points
o Conduct electricity in a molten and aqueous state
o They are hard
o They are brittle
o Soluble in polar solvents such as water (solute-solvent
interactions)

21
Q

IONIC BOND generates

A

two oppositely charged ions

22
Q

metal ______ electrons to become a positively
charged cation, whereas the nonmetal accepts
those electrons to become a ______ charged anion.

A

loses

negatively

23
Q

is a form
of chemical bonding characterized by
the sharing of one or more pairs of
electrons between atoms, in order to
produce a mutual attraction, which
holds the resultant molecule together.

A

Covalent Bonds

24
Q

Covalent Bonds 2 TYPES:

A
  • Polar covalent bond
  • Nonpolar covalent bond
25
Q

A polar covalent bond is formed
when atoms of ______
electronegativities share electrons.

A

slightly different

26
Q

A _______ is formed
when atoms of slightly different
electronegativities share electrons.

A

polar covalent bond

27
Q

is formed between same
atoms or atoms with very similar electronegativities—
the difference in electronegativity between bonded
atoms is less than 0.5

A

NONPOLAR COVALENT BOND

28
Q

Properties of Covalent Compounds

A

o Liquids and gases at room temperature
o Relatively low boiling point.
o Do not conduct electricity
o Insoluble in polar solvent
o Soluble in non-polar solvent

29
Q

unequal sharing of electrons, one is giving more than the other

A

Polar Covalent Bond

30
Q

equal sharing of electrons, very small difference

A

Nonpolar Covalent Bond

31
Q

overlapping of the two atomic orbitals

A

Pi Bond

32
Q

Head to head overlapping of two atomic orbitals

A

Sigma Bond

PPAR (13 decks)

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