What are the quantum numbers for Bromine?
1 Answer
Quantum Numbers define the character of an electron in an energy specific orbital. They do not define an element.
Explanation:
4 Quantum Numbers define the character of an electron in an energy specific orbital.
According to the Pauli Exclusion principle, no two electrons can have the same set of 4 quantum numbers. This is significant in that elements with multiple electrons cannot have more than two in a single orbital.
Think of the set of Quantum Numbers for an electron as being a 'discrete energy window' for that electron and no other electron in the element's electron configuration can occupy the same energy window.
The 4 Quantum Numbers (QN) and what they describe are:
- Principle QN (
#n# ) => Defines Principal Energy Level - Orbital QN (
#l# ); also known as Angular Momentum QN => Shape of Orbital - Magnetic QN (
#m_l# ) => Orientation of orbital in 3 dimensions - Spin QN (
#m_s# ) => the spin of the electron, up or down#pm 1/2# , respectively).
The 4 Quantum Numbers for the 'last' electron to fill a Bromine electronic configuration would be the electron in the half-filled
#=> (n, l, m_l, m_s) = (4, 1, {-1,0,+1}, -1/2) =># represents only one of 35 electrons in the neutral Bromine atom.
We choose the set of
#4p_x^2 4p_y^2 4p_z^(color(blue)(1))#
#4p_x^2 4p_y^(color(blue)(1)) 4p_z^2#
#4p_x^(color(blue)(1)) 4p_y^2 4p_z^2#
