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charge-to-mass ratio (Q/m) instead, which is the multiplicative inverse of the mass-to-charge ratio. The CODATA recommended value for an electron is Q/m...16 KB (2,343 words) - 20:47, 16 June 2024- Historically, the mass of the electron was determined directly from combining two measurements. The mass-to-charge ratio of the electron was first estimated by...10 KB (1,498 words) - 17:58, 28 July 2024
Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions. The results are presented as a mass spectrum...82 KB (10,321 words) - 23:55, 29 July 2024- gyromagnetic ratio is γ = q 2 m {\displaystyle \gamma ={\frac {q}{2m}}} where q {\displaystyle {q}} is its charge and m {\displaystyle {m}} is its mass. The derivation...19 KB (2,383 words) - 03:06, 10 July 2024
- negative electric charge carried by a single electron, which has charge −1 e. In the SI system of units, the value of the elementary charge is exactly defined...22 KB (2,580 words) - 23:09, 22 May 2024
The electron ( e− , or β− in nuclear reactions) is a subatomic particle with a negative one elementary electric charge. Electrons belong to the first...153 KB (15,428 words) - 05:58, 22 July 2024
A mass spectrum is a histogram plot of intensity vs. mass-to-charge ratio (m/z) in a chemical sample, usually acquired using an instrument called a mass...12 KB (1,554 words) - 01:38, 4 March 2024- black hole with the same mass, charge and angular momentum as an electron, it would share other properties of the electron. Most notably, Brandon Carter...9 KB (1,134 words) - 06:07, 3 May 2024
J. J. Thomson (category Mass spectrometrists)particles (now called electrons), which he calculated must have bodies much smaller than atoms and a very large charge-to-mass ratio. Thomson is also credited...55 KB (5,739 words) - 07:54, 3 July 2024
Positron (redirect from Positive electron)the particle with an electric charge of +1e, a spin of 1/2 (the same as the electron), and the same mass as an electron. It is the antiparticle (antimatter...34 KB (3,756 words) - 20:09, 3 August 2024
electron charges at the semiconductor-oxide interface; the CCD is then used to read out these charges. Although CCDs are not the only technology to allow...50 KB (6,382 words) - 15:04, 6 June 2024
possible fragment ions from the mass spectra. Mass spectra is a plot of relative abundance against mass-to-charge ratio. It is commonly used for the identification...24 KB (2,827 words) - 18:35, 11 December 2023- Plasma parameters (redirect from Electron temperature)ion mass is expressed in units of the proton mass, μ = m i / m p {\displaystyle \mu =m_{i}/m_{p}} and the ion charge in units of the elementary charge e...13 KB (2,384 words) - 13:11, 9 January 2024
ions by their mass-to-charge ratio (often given as m/z or m/Q). Ions of a particular m/z-ratio coming from MS1 are selected and then made to split into smaller...60 KB (7,340 words) - 12:26, 31 July 2024
Atomic number (redirect from Nuclear charge number)held most of the atom's mass and a positive charge which, in units of the electron's charge, was to be approximately equal to half of the atom's atomic...15 KB (1,938 words) - 02:10, 26 July 2024- factors. For electrons or electron holes in a solid, the effective mass is usually stated as a factor multiplying the rest mass of an electron, me (9.11...26 KB (3,717 words) - 20:05, 25 March 2024
{x}})|^{2}} is proportional to the charge density of the electron at any point. In atoms and molecules the charge of the electrons is distributed in clouds...25 KB (3,738 words) - 01:46, 24 April 2024
analysis." It was the first modern mass spectrometer and used positive rays to determine the ratio of the mass to charge of various constituents. In this...31 KB (4,003 words) - 06:11, 3 July 2024- G-factor (physics) (redirect from Electron Spin G Factor)the ratio of the magnetic moment (or, equivalently, the gyromagnetic ratio) of a particle to that expected of a classical particle of the same charge and...12 KB (1,533 words) - 19:24, 2 June 2024
Proton (redirect from Proton mass)electric charge of +1 e (elementary charge). Its mass is slightly less than the mass of a neutron and 1836 times the mass of an electron (the proton-to-electron...68 KB (7,042 words) - 08:02, 22 July 2024
- The electrons, which Thomson at first called corpuscles, are point charges of negative electricity, their inertia showing them to have a mass equal to about
- The electron is a subatomic particle with a negative elementary electric charge, indicated by the symbol e− or β−. It is classified as a fermion and as
- The mass-to-charge ratio, is a physical quantity that is widely used in the electrodynamics of charged particles, e.g. in electron optics and ion optics