Chemistry Flashcards
Where are electrons located?
Orbitals
According to the Bohr model, If an electron is farther from the nucleus does is have higher or lower energy?
Higher Energy
What are the orbitals?
s, p, d, f, z
mass number (p+n) -> 235 | |
atomic # -> 92 |\_\_\_|
Uranium is the drawn
figure....
What are the protons, neutrons, electrons, and charge?92 =protons
92 =electrons
143=neutrons (subtract protons from mass number)
How many orbitals are in the first subshell of orbital?
1 (each orbital can hold 2 electrons)
__
1s
How many orbitals can be held in the 2nd subshell?
4 orbitals or 8 electrons
__ __ __
__ 2p
2s
How many orbitals can be held in the 3rd subshell?
9 orbitals or 18 electrons
\_\_ \_\_ \_\_ \_\_ \_\_
\_\_ \_\_ \_\_ 3d
\_\_ 3p
3sHow many orbitals are in the 4th subshell?
16 or 32 electrons __ __ __ __ __ __ __
__ __ __ __ __ 4f
__ __ __ 4d
__ 4p
4s
Exceptions*
Cu, Ag, Au
What is the electron configuration?
and what about for Cr and Mo?
Cu: [Ar] 4s1 3d10 Cr: [Ar] 4s1 4d5
Ag: [Kr] 5s1 4d10 Mo: [Kr] 5s1 5d5
Au: [Xe] 6s1 5d10
What is Paramagnetic?
Has unpaired electrons
will deflect in a magnetic field
What is Diamagnetic?
All electrons paired
will not deflect in a magnetic field
Quantum Numbers: n l ml ms
n = principle (shell#) (n) l = azimuthal (subshell) 0=s 1=p 2=d 3=f (n-1) ml = magnetic (specific orbital or orientation space) (-l...+l) ms = spin ( -1/2 or +1/2) )
What is the electronic configuration
[Ne]3s14p1
belong to?
Mg in its “excited state”
What make a nucleus stable?
1.Even number of protons and or neutrons.
2. N/Z ~ 1 (for all atoms up to calcium)
N=number of neutrons
Z= number of protons
This is called belt of stability
Periodic Trends:
Atomic Radius?
|
|/
Fr <—-
Bigger down and to the left
