Electron Configuration
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period
row of periodic table
What does the period number correspond to?
principle energy level
group
column of periodic table
What does the group number correspond to?
number of electrons in valence level
What is electron configuration based on?
Quantum Mechanical Model
What will electrons in the ground state occupy?
lowest possible energy level
What can electrons only have?
specific energy levels
What is each energy level split into?
sublevels
Are all sublevels available at every energy level?
no
What are sublevel made up of?
a number of possible orbitals
What does each orbial have?
identical energy
How many possible orbitals does the s sublevel have?
1
How many possible orbitals does the p sublevel have?
3
How many possible orbitals does the d sublevel have?
5
How many possible orbitals does the f sublevel have?
7
What does each orbital represent?
a region in space with 90% chance of finding a specific electron
How many electrons can occupy any specific orbital?
maximum 2 electrons
Describe the s sublevel.
1 orbital spherical
Desribe the p sublevel.
3 orbitals dumbell shaped
Aufbau principle
gives order of electron configuration
Hund Rule
gives half fill identical orbitals then pair up electrons
Pauli Exclusion
no 2 electrons can be identical
What must be done when drawing energy level diagrams for 3d and 4s?
Put overlap
1st ionization energy
energy needed to remove 1 mol of electrons from 1 mol of atoms in gaseous state removal of electron in highest energy level to infinity