Lewis Structures
What is the octet rule?
The tendency for atoms to have 8 electrons surrounding it in a Lewis structure
When naming inorganic compounds like the ones in this chapter do both elements need prefixes, only the first element, or only the last element?
Both prefixes if there is more than one of the first element and always for the second element.
What does the VESPR theory help with predicting?
The shape of molecules
Would an electronegativity difference of 0.2 be polar or nonpolar?
Nonpolar
How many electrons does a dash represent in a lewis structure?
2
Draw the lewis structure for oxygen.
6 electron dots total
How many sulfurs and oxygens are in the compound tetrasulfur dioxide?
4 sulfurs and 2 oxygens
How many atoms are bonded to the central atom and how many unshared pairs are on the central atom in H2O.
2 and 2
Free points!
Lucky choice!
Covalent bonds occur between which classification of elements?
nonmentals
True or false: all atoms must satisfy the octet rule.
False
What is the prefix designating 3?
Tri
What shape and bond angle does h2o contain?
bent 104.5
Would a compound with a high melting point have a high or low level of polarity?
High
Which element goes in the middle of a lewis structure?
Least electronegativity.
Draw the lewis structure for nitrate
Good Work!
Name the following compound: CO
carbon monoxide
What shape and bond angle would PCl3 have?
trigonal pyramidal 107.3
Would a compound with a low polarity have bonds that are easily broken or hard to break?
Easily broken
Are double or single bonds stronger?
double
Draw the lewis structure for phosphate
Nice work!
Name the following compound: N3S4
trinitrogen tetrasulfide
why do lone pairs cause a smaller bond angle?
lone pairs cause greater electron repulsion than terminal atoms.
Which compound would you predict to have a higher melting point: CF4 or SO2?
SO2
order the bonding types based on highest to lowest melting points:
nonpolar covalent
polar covalent
Ionic
Metallic
Metallic
Ionic
Polar
Nonpolar