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A proton is a stable subatomic particle, symbol. p. , H +, or 1 H + with a positive 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 mass ratio ). Protons and neutrons, each with a mass of approximately one atomic mass unit, are ...
Proton Mail (previously written as ProtonMail) is a Swiss end-to-end encrypted email service founded in 2013 headquartered in Plan-les-Ouates, Switzerland. [7] It uses client-side encryption to protect email content and user data before they are sent to Proton Mail servers, unlike other common email providers such as Gmail and Outlook.com. [8]
Proton AG is a Swiss technology company offering privacy -focused online services. It was founded in 2014 by a group of scientists who met at CERN and created Proton Mail. [6] [7] The company's products are Proton Mail, Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. It is also the parent company of SimpleLogin and Standard Notes .
proton .com. Proton Holdings Berhad, commonly known as Proton (stylised PROTON ), is a Malaysian multinational automotive company. Proton was established on May 7, 1983, as Malaysia's sole national budget car company until the advent of Perodua in 1993. The company is headquartered in Shah Alam, Selangor, and operates additional facilities in ...
Proton VPN is a VPN service launched in 2017 [7] and operated by the Swiss company Proton AG, the company behind the email service Proton Mail. [8] [9] According to its official website, Proton VPN and Proton Mail share the same management team, offices, and technical resources, and are operated from Proton's headquarters in Plan-les-Ouates, Switzerland.
In medicine, proton therapy, or proton radiotherapy, is a type of particle therapy that uses a beam of protons to irradiate diseased tissue, most often to treat cancer.The chief advantage of proton therapy over other types of external beam radiotherapy is that the dose of protons is deposited over a narrow range of depth; hence in minimal entry, exit, or scattered radiation dose to healthy ...
Proton-to-electron mass ratio. In physics, the proton-to-electron mass ratio (symbol μ or β) is the rest mass of the proton (a baryon found in atoms) divided by that of the electron (a lepton found in atoms), a dimensionless quantity, namely: μ = mp / me = 1 836.152 673 426(32). The number in parentheses is the measurement uncertainty on ...
J. J. Thomson. Sir Joseph John Thomson OM FRS [ 1] (18 December 1856 – 30 August 1940) was a British physicist and Nobel Laureate in Physics, credited with the discovery of the electron, the first subatomic particle to be found. In 1897, Thomson showed that cathode rays were composed of previously unknown negatively charged particles (now ...