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| General
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| Name, Symbol, Number
| Astatine, At, 85
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| Series
| Halogens
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| Group, Period, Block
| 17 (VIIA), 6, pThe p-block of the periodic table of elements consists of the last six groups. In the elemental form of the p-block elements, the highest energy electron occupies a p- orbital. The p-block contains all of the nonmetals and semimetals, as well as some of t
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| DensityFor other meanings of density, see density (disambiguation Density (symbol: rho Greek: rho) is a measure of mass per unit of volume. The higher an object's density, the higher its mass per volume. The average density of an object equals its total mass div, Hardness
| no data, no data
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| AppearanceFor alternative meanings, see color (disambiguation). visual arts. Color (or colour is a sensation which (in humans) derives from the ability of the fine structure of the eye to distinguish three differently filtered analyses of a view. The perception of
| metallic
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| Atomic properties
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| Atomic weightIn reference to a certain isotope of a chemical element, atomic weight (more accurately relative atomic mass though also called simply atomic mass is the mass of one atom of the isotope expressed in units atomic mass unit amu) such that the Carbon-12 isot | [210] amuThe atomic mass unit amu , unified atomic mass unit u , or dalton Da , is a small unit of mass used to express atomic masses and molecular masses. It is defined to be 1/12 of the mass of one atom of Carbon-12. Accordingly, :1 u 1/N gram 1/(1000 N) kg (whe
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| Atomic radiusAtomic radius is the distance from the atomic nucleus to the outmost stable electron orbital in a atom that is at equilibrium and is measured in picometers or Angstroms. Atomic radii are called covalent radii (a reference to the types of bonds formed) whe | no data
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| Covalent radiusCovalent radius in chemistry corresponds to half of the distance between two identical atomic nuclei, bound by a covalent bond. It is expressed in terms of pm or A. Chemistry. | 127 pm
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| van der Waals radius | no data
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| Electron configuration
| [ Xe]4 f14 5 d10 6 s2 6p5
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| e- 's per energy level
| 2, 8, 18, 32, 18, 7
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| Oxidation states ( Oxide) | ±1,3,5,7 (unknown)
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| Crystal structure | no data
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| Physical properties
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| State of matter | solid
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| Melting point
| 575 K (576 ° F)
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| Boiling point | no data
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| Molar volume | no data
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| Heat of vaporization | no data
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| Heat of fusion | 114 kJ/mol
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| Vapor pressure | no data
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| Speed of sound | no data
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| Miscellaneous
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| Electronegativity | 2.2 ( Pauling scale)
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| Specific heat capacity | no data
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| Electrical conductivity | no data
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| Thermal conductivity
| 1.7 W/(m*K)
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| 1st ionization potential
| 920 kJ/mol (estimated)
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| Most stable isotopes
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| SI units & STP are used except where noted.
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