Atomic Structure & Periodicity
5 terms
s-Block Elements
Atomic Structure & Periodicity
Dimensionless
The elements of groups 1 and 2, plus helium, whose outermost electrons occupy an s orbital.
ns¹ or ns²
Schrödinger Wave Equation
Atomic Structure & Periodicity
J
The fundamental equation of quantum mechanics whose solutions give the allowed energies and wavefunctions of a system.
Ĥψ = Eψ
Shielding Effect
Atomic Structure & Periodicity
Dimensionless
The reduction in the nuclear attraction felt by an outer electron caused by repulsion from electrons in inner shells.
Z_eff = Z − σ
Spin Quantum Number
Atomic Structure & Periodicity
Dimensionless
The quantum number mₛ describing the intrinsic angular momentum of an electron, restricted to +½ or −½.
mₛ = ±½
Successive Ionisation Energies
Atomic Structure & Periodicity
kJ/mol
The series of energies required to remove electrons one after another from the same atom.
IE₁ < IE₂ < IE₃ …