1.3.3-5 --> Electron configuartion Flashcards
2MAR25
What does the quantum theory suggest?
That it is sometimes better to think of an electron of having wave properties
Limitations of Bohr diagram?
- Assumes electrons are in fixed orbitals
- Assumes orbitals are circular
- Scale is incorrect
- Only works for hydrogen
What does Heisenberg’s uncertainty principle explain?
That we can’t know where an electron is at any given moment in time
When is IR radiation produced?
When an electron falls to n=3
Where will an electron have a higher probability of being found when it is in an orbital of higher energy?
Further from the nucleus
What does the Pauli exclusion principle state?
That an orbital can hold only two electrons of opposite spin
What do wave functions do?
Give the probability of finding an electron
What is an atomic orbital?
Region of space where electrons are 99% likely to be found
What are elements grouped by on the periodic table?
Their valence electron orbitals
What are orbital diagrams?
Diagrams that show the energy levels, orbital shapes, and how many electrons in each orbital
What is the aufbau principle?
Electrons will always fall to the lowest energy first
Hund’s rule?
If more than one orbital in a sublevel is available, electrons will occupy different orbitals with parallel spin before being paired up
What is the electron configuration for chromium?
[Ar]3d^5 4s^1
What is the electron configuration for copper?
[Ar] 3d^10 4s^1
What do the squared brackets around argon represent?
It’s electron configuration
-> 1s^2 2s^2 2p^6 3s^2 3p^6
How are positive ions (cations) formed?
By the loss of electrons
Where are electrons lost from?
Outer sublevel
