Ionic and molecular bonds

Question 1

what are the properties of ionic compounds

Answer 1

hard and brittle - ionic bonds are very strong, in crystal lattice
high boiling points
conduct electricity as liquids(not solids)
conduct electrivcity when dissolved in water

Question 2

Do ionic compounds have molecules?

Answer 2

No

Question 3

properties of molecular compounds

Answer 3

can be solid liquid or gas
solids can be soft, waxy, crystalline.
low boiling/ melting points
poor conductivity

Question 4

Why is the boiling point and melting point of molecular compounds lower than ionic?

Answer 4

The bonds between molecular compounds are not as strong as ionic. Mol comp are more likely to break apart.

Question 5

Which elements are diatomic?

Answer 5

HOFBrICl

Question 6

What is the bonding capacity

Answer 6

the number of covalent bonds that an atom can form. The bonding capacity is usually equivalent to the number of unpaired electrons in the valence shell of an atom

Question 7

What is formal charge

Answer 7

The difference between the valence electrons in an isolated atom and the number of electrons assigned to that atom in a Lewis structure
Formal charge = # of valence e- - # of unbonded e- - (# of bonded e-/2)

Question 8

Why is it important to consider formal charge when drawing bonds

Answer 8

The formal charge of an atom must be as low as possible.
You cannot have a positive formal charge atom bonded to a negative charged atom

Question 9

What are resonance structures in molecules

Answer 9

when the bonds can be on multiple atoms
ex. CO3. THe double bond could be on any off the 3 oxygen’s. This is a resonance strucure
Draw 3 times or use a dotted second line