Molecular

Question 1

Molecular compounds

Answer 1

rather than forming ions, the atoms of a molecule share their valence electrons in a way that forms bonds between the atoms

Question 2

Properties

Answer 2

• gas,liquid or soils at room temperature
• variable water solubility
• low melting and boiling point
• poor electrical conductivity
• tend to be soft and relatively Flexible
• more flammable than ionic

Question 3

Naming

Answer 3

• remove ending of second element and change to ide
• prefixes to indicate the number of a given element present in the compound
• drop prefix if only one in first element
• general more electropositive first followed by electronegative

Question 4

Prefixes

Answer 4

Mono
Di 
Tri 
Tetra 
Penta 
Hexa 
Hepta 
Octo 
Nona 
Deca

Question 5

Acid Naming H+Element

Answer 5

• all start with hydro
• end with acid
• element ending changes to ic

Question 6

H+ Polyatomic ion

Answer 6

+1 : per and ic
Base: ic
-1: ous
-2: hypo and ous

Question 7

Bases

Answer 7

• most bases end with hydroxide expect for NH3 and NH4

- metal + hydroxide ion

Question 8

What do we use electronegative difference to determine

Answer 8

If a bond is covalent or ionic

If a bond is polar or non polar

Question 9

Covalent or ionic

Answer 9

-covalent: 1.69 or less

Ionic: 1.7 or greater

Question 10

Polar and non plat

Answer 10

if electrons share equally or pull closer one atom

• equal EN= 0
• not equal .1 or higher bond is polar

Question 11

Linear

Answer 11

Bonded pairs:varies

lone pairs on central atom: 0 when 3 or more atoms

Question 12

Bent

Answer 12

Bonded pairs:2 Lone pairs on CA: 2

Ex: H20

Question 13

Trigonal Planar

Answer 13

Bonded pairs: 3 lone pairs CA: Ex. BH3

Question 14

Trigonal Pyramid

Answer 14

Bonded pairs : 3 Lone pairs on CA: 1

Ex. PH3

Question 15

Tetrahedral

Answer 15

Bonded pairs : 4
Lone pairs on central atom: 0
Ex CH4

Question 16

Observe Symmetry for Molecule Polarity

Answer 16

• when a compound is symmetrical, it is non-polar molecule
• lone pairs on central atom interfere with symmetry
• asymmetrical atom is consider polar

Question 17

Using charge cancellation and dipole moment

Answer 17

In a compound we normally have charged atoms, so when we have an atom with a larger EN this is called slightly negative, the smaller the EN is called slightly positive

Question 18

What does charge cancellation mean

Answer 18

No charge cancellation molecule is polar

No charge remain molecule is non polar