Structure of Atom - Electron Shells Flashcards
How does quantum mechanics make us view electrons as?
A negatively charged cloud that is both a wave ad a particle at the same time
Not needed for exam - just helps
What is another name for electron shell?
Major energy level
How many electron shells exist theoretically? Why is this not witnessed?
Infinite amount of electron shells present. Not seen as higher shells require more energy to be occupied.
How many electron shells exist in our known ground state?
7
How are major energy levels/electron shells named?
- Can be numbered (1,2,3…)
- Have names (K,L,M…)
What is the formula for calculating maximum number of electrons able to exist in a major energy level/electron shell?
2n^2
What is found within electron shells?
Electron subshells
What is another name for subshells?
Minor energy levels
How are subshells named?
s,p,d,f,g,h
From lowest to highest energy
How many subshells does a shell have?
Same amount as shell number:
Shell 1 = 1 subshell (s)
Shell 2 = 2 subshells (s,p)
Shell 3 = 3 subshell (s,p,d)
Shell 4 = 4 subshells (s,p,d,f)
Shell 5 = 5 subshell (s,p,d,f,g)
What does each subshell have?
Orbital(s)
What are orbitals?
Regions in space that may contain electrons and resemble a negatively charged cloud
Reference to quatum mechanics
What does Pauli Exclusion Principle state?
An atomic orbital may hold a maximum of 2 electrons but may contain 0 or 1
How many orbitals does each subshell possess?
s = 1
p = 3
d = 5
f = 7
Goes up by two
What is outermost occupied shell called?
Valence shell
