Molecular Compounds

Question 1

The Covalent Bond

Answer 1

• non metals share electrons through covalent bond

Question 2

diatomic molecules

Answer 2

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

Question 3

lewis Structures of Molecular Compounds

Answer 3

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

Question 4

lone pair

Answer 4

none bonded pairs of electrons

Question 5

covalent bond

Answer 5

pair of shared/bonded electrons

Question 6

structural formula

Answer 6

• only included covant bonds
• no lone pairs

Question 7

1. lewis Structures of complex Molecular Compounds

Answer 7

1. least electronegative atom= in middle

Question 8

2.lewis Structures of complex Molecular Compounds

Answer 8

2. all other atoms surround central atom

Question 9

3. lewis Structures of complex Molecular Compounds

Answer 9

3. find total valance electrons of all atoms and find the charges of each

Question 10

4. lewis Structures of complex Molecular Compounds

Answer 10

4. create covalent bonds for central atom and extra atoms go around remaining atoms
   - if remaining atoms are full, they can go on central atom

Question 11

5. lewis Structures of complex Molecular Compounds

Answer 11

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

Question 12

6. lewis Structures of complex Molecular Compounds

Answer 12

• replace ectrons of covant bond with lines and create square bracket + charge

Question 13

State at room temp.

Answer 13

Solid, liquid, or gas

Question 14

Physical properties

Answer 14

soft, waxy, flexible, or crystalline

Question 15

Relative melting/boiling point

Answer 15

Lower than ionic

Question 16

Solubility in water

Answer 16

Some good, some poor

Question 17

Electrical conductivity as a solid

Answer 17

Low or none

Question 18

Ratios of Ionic vs. molecular compounds

Answer 18

• 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)

Question 19

Electrical conductivity when dissolved in water (aqueous)

Answer 19

Low or none

Question 20

Ionic vs. Molecular Compounds Elements in compound

Answer 20

Ionic Compounds
metal + non metal

Molecular compound
non-metals

Question 21

Ionic vs. Molecular Compounds Ions created during formation

Answer 21

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

Question 22

Ionic vs. Molecular Compounds Type of chemical bonds

Answer 22

Ionic: ionic bond
Molecular: covalent

Question 23

Ionic vs. Molecular Compounds Bulk structure

Answer 23

Ionic: Crystal lattice
Molecular: Separate molecules