Chapter 5+6 Flashcards
What do molecules tend to hed towards to be stable?
Being Isoelectronic with a noble gas
Ionic
Metals to non-metals
Covalent
Non-metals to non-metals
Metalic
Metals, delocalized electrons, electrically conductive
Molecular orbital theory
Atomic orbitals combine to make molecular orbitals (molecular orbitals make bonds)
Valence bond theory
Each atom retains it’s own orbitals (bonds form when orbitals overlap)
Bond quickbits
Bond is measured in d
Bonds are weaker and longer between larger atoms
The stronger the bond the shorter the bond
Molecular orbital theory 2 types of orbitals
Addition of two orbitals (bonding orbital)
Subtraction of two orbitals (antibonding orbital)
What does MO theory evaluate?
The energetics of a molecule
What energies and forms of bonding are in mo theory
Lower energy (constructive bonding)
Higher energy(destructive bonding -antibonding)
S-orbitals combine once into…
1sigma and 1sigmastar
Px orbitals combine once to form…
Sigma and sigmastar
Py and Pz orbitals combine twice into…
2pi and 2pi star orbitals
Homonuclear species (h2, n2) are ..
At the same energy level
Bond orbital equation is..
(#of e (#of bonding) - # of antibonding)/2
If Bo cancels out (=0)…
No bonds exist
For boron, carbon, and nitrogen, the pi 2p bond is
Below the pi sigma bond
For oxygen, fluorine, or neon gas, the pi 2p is…
Above the sigma 2p
Things with partial bond orders or half pls levels filled are
Paramagnetic
Ionic naming
Cation anion-ide
Name KI
Potassium iodide
MgF2
Magnesium Fluoride
Name CaO
Calcium Oxide
Transition metals have two names if they have 2 common ions
-ous (lower charge)
-ic (higher charge)
Name SnCl2
(stannous chloride)
SnCl4
Stannic chloride
Ti charges
3+ 4+
V charges
3+ 5+
Cr charges
3+2+
Mn charges
2+4+
Iron charges
2+3+
Cobalt charges
2+3+
Ni charges
2+3+
Cu charges
2+1+
Zinc charges
2+
Ga charges
3+
Ge charge
4+
As charge
3-
Se charge
2-