Small sample of pale yellow liquid fluorine condensed in liquid nitrogen عمومي خواص Pronunciation / ˈ f l ʊər iː n / / ˈ f l ʊər ɪ n / / ˈ f l ɔər iː n / FLOOR FLOOR FLOHR Allotropes alpha, beta Appearance gas: very pale yellow Fluorine پهدوراني جدول کې اټومي شمیره (Z ) 9 گروپ ,پیریود group 17 (halogens) period 2 بلاک p-block Element category diatomic nonmetal معياري اټومي وزن (A r ) کينډۍ:Val [ ۱] Electron configuration [He ] 2s2 2p5 [ ۲] Electrons per shell
2, 7 فزیکي خواص حالت (at STP) گاز دويلې کيدو ټکى 53.48 K (−219.67 °C, −363.41 °F)[ ۳] يشنا ټکی 85.03 K (−188.11 °C, −306.60 °F)[ ۳] کثافت (at STP) 1.696 g/L[ ۴] when liquid, at b.p. 1.505 g/cm3 [ ۵] Triple point 53.48 K, 90 kPa[ ۳] Critical point 144.41 K, 5.1724 MPa[ ۳] Heat of vaporization 6.51 kJ/mol[ ۴] Molar heat capacity Cp : 31 J/(mol·K)[ ۵] v : 23 J/(mol·K)[ ۵] Vapor pressure اټومي خواص Oxidation states −1 Electronegativity Pauling scale: 3.98[ ۲] Ionization energies 1st: 1681 kJ/mol 2nd: 3374 kJ/mol 3rd: 6147 kJ/mol (more )[ ۶] Covalent radius 64 pm [ ۷] Van der Waals radius 135 pm[ ۸] Miscellanea Crystal structure cubic Cubic crystal structure for fluorine د تودوخې تېرېدنه 0.02591 W/(m·K)[ ۹] Magnetic ordering diamagnetic (−1.2×10−4 )[ ۱۰] [ ۱۱] CAS Number 7782-41-4[ ۲] History Naming after the mineralfluorite , itself named after LatinLua error in Module:Unicode_data at line 297: attempt to index local 'data_module' (a boolean value). Discovery André-Marie Ampère (1810) First isolation Henri Moissan [ ۲] (June 26, 1886) Named by Humphry Davy Mainisotopes of fluorine [ ۱۲] | references | in Wikidata 
