See also: Properties of Krypton Atomic Mass of Krypton Krypton – Properties Element Krypton Atomic Number 36 Symbol Kr Element Category Noble Gas Phase at STP Gas Atomic Mass 83.798 Density at STP 3.75 Electron Configuration 3d10 4s2 4p6 Possible Oxidation States 0 Electron Affinity - Electronegativity 3 1st Ionization Energy 13.9996 Year of Discovery 1898 Discoverer Ramsay, Sir William & Travers, Morris Thermal properties Melting Point -157.36 Boiling Point -153.22 Thermal Conductivity 0.00949 Specific Heat 0.248 Heat of Fusion 1.638 Heat of Vaporization 9.029 A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. Krypton is a member of group 18 (noble gases) elements. Between 19, the International Bureau of Weights and Measures defined the length of a meter as 1,650,763.73 wavelengths of light emitted by the krypton-86 isotope.Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure.Krypton-85 is released from facilities creating weapons-grade plutonium. Governments can monitor the atmosphere for krypton-85 to detect secret nuclear weapons programs. Based on the rate of decay they can determine how old the ice is. They compare the amount of krypton-81 in bubbles in the ice to the amounts in our atmosphere today. Krypton-81 can be used to determine the age of ice in Antarctica.Krypton-83 can be used in magnetic resonance imaging (MRI) of the respiratory system.Krypton is used as a propellant for the Hall-effect thruster (HET) on SpaceX Starlink satellites.A neon sign using krypton gas and mercury can produce a bright greenish-blue glow.Fluorescent lamps can use a mixture of argon and krypton to reduce power consumption.Krypton can produce a brilliant white light and is great for photographic flashes for high speed photography.The rarity and expensive cost of krypton limits its commercial uses.Krypton can be extracted from liquid air using a process known as fractional distillation.Scientists are still unsure about how much krypton is in our universe, but initial measurements suggest its abundant. Krypton is measured in our universe using solar winds and meteoric activity.Krypton is quite abundant in our universe, but it’s difficult to measure how abundant.Krypton makes up around 0.000114% of the composition of the Earth’s atmosphere.The five stable isotopes for krypton are 80Kr, 82Kr, 83Kr, 84Kr and 86Kr.The electrons per shell for krypton are 2, 8, 18, 8.The electron configuration for krypton is 3d 10 4s 2 4p 6.Krypton is in the p-block on the periodic table.Krypton is a group 18 chemical element, which is the noble gases group.Krypton is a period 4 chemical element, which is the fourth row on the periodic table.Krypton is in the noble gas element category on the periodic table.The standard atomic weight of krypton is 83.798 u.William Ramsay received the Nobel Prize Chemistry in 1904 for his discovery of krypton and other noble gases.Krypton was discovered in 1898 by Scottish chemist William Ramsay and English chemist Morris Travers.
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