Astatine - symbol At - chemical element of the periodic table,站酷海洛,一站式正版视觉内容平台,站酷旗下品牌.授权内容包含正版商业图片、艺术插画、矢量、视频、音乐素材、字体等,已先后为阿里巴巴、京东、亚马逊、小米、联想、奥美、盛世长城、百度、360、招商银行、
SYMBOL At ATOMIC NUMBER 85 ATOMIC MASS 209.9871 FAMILY Group 17 (VIIA) Halogen PRONUNCIATION AS-tuh-teen Mendeleev's periodic table contained some empty boxes. At first, no one was sure what these empty boxes meant. By the early 1900s, however, chemists had decided that the...
About this element Symbol:At Date of discovery:1940 Name origin:Greekastatos Appearance:unknown Discoverer:D. R. Corson Obtained from:man-made Melting point:575 K Boiling point:610 K Density[kg/m3]:N/A Molar volume:N/A Protons/electrons:85 ...
Symbol At A highly unstable, radioactive element that is the heaviest of the halogen elements. The most stable of its many isotopes has a half-life of only about eight hours. Atomic number 85. See Periodic Table. The American Heritage® Student Science Dictionary, Second Edition. Copyright ...
SymbolAtA highly unstable, radioactive element that is the heaviest of the halogen elements. The most stable of its many isotopes has a half-life of only about eight hours.Atomic number85. SeePeriodic Table. The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014...
Astatine (pronounced as AS-teh-teen) is a non-metal represented by the chemical symbol At, and belongs to the family of halogens[1]. It is not diatomic as it contains only one atom. Among all the members of the halogen group, At shows least reactivity[8]. It has 30 isotopes out of...
Astatine is a chemical element; it has symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. All of astatine's isotopes are short-lived; the most stable is astatine-210, with a ...
Atomic Symbol: AtAtomic Number: 85Atomic Weight: (210)Isotopes (radioactive): 210At, (t1/2 = 8.1 h), 211At, (t1/2 = 7.2 h)1 Atm Melting Point: 575 K (estimate)1 Atm Boiling Point: 610 K (estimate)Common Valences: +5, +1, −1Ionic...
NameAstatine SymbolAt Atomic Number85 Atomic Weight210[note] DensityN/A Melting Point302 °C Boiling PointN/A Thermal properties PhaseSolid Melting Point302 °C Boiling PointN/A Absolute Melting Point577 K Absolute Boiling PointN/A Critical PressureN/A ...
How do you write the chemical symbol for astatine? The chemical symbol for astatine is At. This element is in period 6 group 17 on the periodic table. It is a part of the halogen family, which is a group of electronegative elements in group 17. What is astatine used for? Astatine does...