principal quantum number
111k-shell — ˈ ̷ ̷ˌ ̷ ̷ noun Usage: usually capitalized K : the innermost shell of electrons surrounding an atomic nucleus and constituting the lowest available energy level for the electrons compare l shell, m shell * * * /kay shel /, n. Physics. the first… …
112l-shell — ˈ ̷ ̷ˌ ̷ ̷ noun Usage: usually capitalized L : the second innermost shell of electrons surrounding an atomic nucleus compare k shell, m shell * * * /el shel /, n. Physics. the second shell of electrons surrounding the nucleus of an atom and… …
113m-shell — ˈ ̷ ̷ˌ ̷ ̷ noun Usage: usually capitalized M : the third innermost shell of electrons surrounding an atomic nucleus compare k shell, l shell * * * /em shel /, n. Physics. the third shell of electrons surrounding the nucleus of an atom and… …
114N-shell — /en shel /, n. Physics. the fourth shell of electrons surrounding the nucleus of an atom and containing, when filled, 32 electrons having principal quantum number 4. Cf. K shell, L shell, M shell. [1920 25] …
115radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …
116Nuclear magnetic resonance — This article is about the physical phenomenon. For its use as a method in spectroscopy, see Nuclear magnetic resonance spectroscopy. NMR redirects here. For other uses, see NMR (disambiguation). First 1 GHz NMR Spectrometer (1000 MHz,… …
117Rigid rotor — The rigid rotor is a mechanical model that is used to explain rotating systems. An arbitrary rigid rotor is a 3 dimensional rigid object, such as a top. To orient such an object in space three angles are required. A special rigid rotor is the… …
118Rotational spectroscopy — Part of the rotational vibrational spectrum of carbon monoxide (CO) gas (from FTIR), showing the presence of P and R branches. Frequency is on the x axis, and absorbance on the y axis. Rotational spectroscopy or microwave spectroscopy studies the …
119Richard Feynman — Feynman redirects here. For other uses, see Feynman (disambiguation). Richard P. Feynman Richard Feynman at Fermilab Bor …
120Spin (physics) — This article is about spin in quantum mechanics. For rotation in classical mechanics, see angular momentum. In quantum mechanics and particle physics, spin is a fundamental characteristic property of elementary particles, composite particles… …
