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
True or false: all atoms must satisfy the octet rule.
False
What is the prefix designating 3?
Tri
Why would CO2 take on a linear shape and not a 90 degree shape?
Because a linear shape allows the electrons to be as far away from each other as possible.
Would a compound with a high melting point have a high or low level of polarity?
High
What does it mean if a molecule has a covalent bond?
It is a molecule in which the atoms share at least one pair of electrons
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!
At which point in the graph on the board shows the highest and lowest energy points when forming a covalent bond?
Point A is the highest, point C is the lowest
Draw the lewis structure for H2O
Good Work!
Name the following compound: CO
carbon monoxide
What shape would H2O have?
Bent
Would a compound with a low polarity have bonds that are easily broken or hard to break?
Easily broken
As bond length goes up, does bond energy go up or down?
Down
Draw the lewis structure for SCN -
Nice work!
Name the following compound: N3S4
trinitrogen tetrasulfide
What shape would PCl3 have?
Pyramidal
Which compound would you predict to have a higher melting point: H2O or CO2?
H2O
As electronegativity difference between atoms in a covalent bond goes up, does bond energy go up or down?
Up