Exam 1 Flashcards
Which electron shell contains S orbitals?
first
Which electron shell contains P orbitals?
second
Which electron shell contains electrons used to create bonds?
valence/outer shell
How can you determine the amount of valence electrons from the periodic table?
group number
What do the unpaired electrons on a lewis structure indicate?
the number of bonds the atom can create in its neutral state
How many bonds does a neutral carbon make?
4
What is the formula to calculate formal charge of a compound?
FC= (valence e-)-(# bonds)-(# non-bonded e-)
When is it necessary to calculate formal charge?
when the element is following its normal bonding pattern
Which type of formula gives information about bonding pattern/connectivity?
condensed structural formula
Which groups can NEVER exceed the octet rule?
1 and 2
How are covalent bonds created?
overlapping atomic orbitals to share electrons
What is a pi bond?
sideways overlap of atomic orbitals above/below the internuclear plane
What is a sigma bond?
direct overlap of atomic orbitals
How many regions of electron density are there for a tetrahedral geometry?
4
How many regions of electron density are there for a trigonal planer geometry?
3
How many regions of electron density are there for a linear geometry?
2
How many regions of electron density are there for a bent geometry?
4
How many regions of electron density are there for a trigonal pyramidal geometry?
4
What is an anti bonding orbital?
2 out of phase orbitals (different shape or shading)
How is a ring denoted in structural form?
listed together in condensed form
What is a saturated hydrocarbon?
has the maximum number of H atoms possible per ‘n’ carbon
how many DU is a double bond?
1 DU
How many DU is a ring?
1 DU
How many DU is a triple bond or two double bonds?
2 DU
what is the effect on DU when you add an O?
no effect
what is the effect on DU if you add a N?
+1 H atom
What is the effect on DU if you add a halogen?
-1 H atom
How many C is a methyl carbon bonded to?
1
How many C is a methylene carbon bonded to?
2