Atomic Structure & Periodicity
60 terms · page 3 of 3
Principal Quantum Number
The quantum number n that specifies the main energy level and average distance of an electron from the nucleus.
Atomic Structure & PeriodicityProton
A positively charged subatomic particle found in the atomic nucleus, carrying a charge of +1 elementary unit.
Atomic Structure & PeriodicityQuantum Mechanical Model
The modern description of the atom in which electrons are represented by wavefunctions giving probability distributions rather than…
Atomic Structure & PeriodicityRutherford Model
The nuclear model of the atom, in which a tiny dense positive nucleus is surrounded by orbiting electrons in mostly empty space.
Atomic Structure & PeriodicityRydberg Formula
The empirical equation predicting the wavelengths of the spectral lines emitted by a hydrogen-like atom.
Atomic Structure & Periodicitys-Block Elements
The elements of groups 1 and 2, plus helium, whose outermost electrons occupy an s orbital.
Atomic Structure & PeriodicitySchrödinger Wave Equation
The fundamental equation of quantum mechanics whose solutions give the allowed energies and wavefunctions of a system.
Atomic Structure & PeriodicityShielding Effect
The reduction in the nuclear attraction felt by an outer electron caused by repulsion from electrons in inner shells.
Atomic Structure & PeriodicitySpin Quantum Number
The quantum number mₛ describing the intrinsic angular momentum of an electron, restricted to +½ or −½.
Atomic Structure & PeriodicitySuccessive Ionisation Energies
The series of energies required to remove electrons one after another from the same atom.
Atomic Structure & PeriodicityTransition Element
An element whose atom or a stable ion has a partially filled d subshell.
Atomic Structure & PeriodicityValence Electron
An electron in the outermost occupied shell of an atom, available for bonding.