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Atomic number (Z): 54: Group: group 18 (noble gases) Period: period 5: Block p-block Electron configuration [] 4d 10 5s 2 5pElectrons per shell: 2, 8, 18, 18, 8: Physical properties
The idea of a correlation between molecular geometry and number of valence electron pairs (both shared and unshared pairs) was originally proposed in 1939 by Ryutaro Tsuchida in Japan, [6] and was independently presented in a Bakerian Lecture in 1940 by Nevil Sidgwick and Herbert Powell of the University of Oxford. [7]
Xenon tetroxide is a chemical compound of xenon and oxygen with molecular formula XeO 4, remarkable for being a relatively stable compound of a noble gas.It is a yellow crystalline solid that is stable below −35.9 °C; above that temperature it is very prone to exploding and decomposing into elemental xenon and oxygen (O 2).
The noble gases (historically the inert gases, sometimes referred to as aerogens [1]) are the members of group 18 of the periodic table: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn) and, in some cases, oganesson (Og).
The 2.3 kW NSTAR ion thruster developed by NASA for the Deep Space 1 spacecraft during a hot fire test at the Jet Propulsion Laboratory (1999) NEXIS ion engine test (2005) A prototype of a xenon ion engine being tested at NASA's Jet Propulsion Laboratory (2005)
In chemistry, a trigonal pyramid is a molecular geometry with one atom at the apex and three atoms at the corners of a trigonal base, resembling a tetrahedron (not to be confused with the tetrahedral geometry).
Zenon: Girl of the 21st Century is a 1999 American science fiction comedy film directed by Kenneth Johnson and starring Kirsten Storms as the eponymous heroine. [1] The film was based on the book Zenon: Girl of the 21st Century written by Marilyn Sadler and Roger Bollen.
Nitrosonium octafluoroxenate(VI) is a chemical compound of xenon with nitrogen, oxygen, and fluorine, having formula (NO) 2 XeF 8.It is an ionic compound containing well-separated nitrosonium cations (NO +) and octafluoroxenate(VI) anions (XeF 2−