English name: arsenic
Chinese name: arsenic
Atomic number: 33
Refractive index: (solid) 1.00 1552+0552
Enthalpy of atomization: kJ /mol @25℃30 1.3.
Volume elastic modulus: GPa22
Heat capacity: j/ (mol k) 24.64
Electrical conductivity: 10 6/(cm ω) 0.0345.
Thermal conductivity: w/(m k) 50.2
Heat of vaporization: (kJ/mol) 34.760
Content of elements in the universe: (ppm)0.008.
Relative atomic mass: 74.96438+06
Common valence: -3, +3, +5.
Electronegativity: 2.2
Peripheral electronic configuration: 4s2 4p3
Extranuclear electron configuration: 2,8,18,5
Isotope and radiation: as-71[2.7d] as-72 [26h] as-73 [80.3d] as-74 [17.8d] as-75as-76 [26.3h] as-77 [39h].
Electron affinity energy and energy: 78.3 kj mol-1.
The first ionization energy: 944 kj mol-1.
Secondary ionization energy:1797.8 kj mol-1.
The third ionization energy: 2735.5 kj mol-1.
Element density: 5.72g/cm3.
Melting point of single substance: 8 17.0℃
Simple substance boiling point: 6 13.0 sublimation℃
Atomic radius: 1.33 angstrom
Ion radius: 0.58 (+5) a.
Covalent radius: 1.2 angstrom
Common compounds: ash3as2o3as2o3as2o5ah3as4S4.
Discovery: It has been discovered since ancient times.
Time: 0
Location: unknown
The origin of the name: Greek: arsenikon；; Latin: Arsenic (all names for yellow dyes).
Element description: iron gray, brittle, between metal and nonmetal. Yuan dynasty (1206- 1368)
Source: Found in poisonous sand.
Elemental uses: Most arsenic compounds are lethal and can be used as herbicides and rodenticides. Conducts electricity and can be used as a semiconductor. Some compounds of arsenic-called arsenides-are used to make paints, wallpaper and ceramics.
Details are as follows:
1. As an alloy additive, arsenic is used to produce lead pellets, printing alloys, brass (for capacitors), battery grids, wear-resistant alloys, high-strength structural steels and corrosion-resistant steels. When arsenic is contained in brass, dezincification can be prevented.
2. High-purity arsenic is the raw material for preparing compound semiconductors such as gallium arsenide and indium arsenide, and is also the doping element of semiconductor materials such as germanium and silicon. These materials are widely used as diodes, light emitting diodes, infrared emitters and lasers.
Arsenic compounds are also used to make pesticides, preservatives, dyes and drugs.
lead
Chinese name: lead
Volume elastic modulus: GPa 46
Enthalpy of atomization: kJ /mol @25℃ lead
194.6
Heat capacity: j/ (mol k) 26.650
Thermal conductivity: w/(m k) 35.3
Conductivity: 10 6/(cm ω) 0.4438+0.
Heat of fusion: (kj/mol) 4.799.
Heat of vaporization: (kj/mol) 177.70
Content of elements in the universe: (ppm) 0.0 1.
Relative atomic mass: 207.2
Common valence: +2, +4
Electronegativity: 1.6
Peripheral electronic configuration: 6s2 6p2
Extranuclear electron configuration: 2,8,18,32,18,4.
Isotope and radiation: Pb-202 [53000y] Pb-203 [2.16d] Pb-204pb-205 [1.5e7y] Pb-206pb-207 * Pb-208pb-209 [3.
Electron affinity energy and energy:101.3 kj mol-1.
The first ionization energy: 716 kj mol-1.
Secondary ionization energy: 1450kJ mol- 1.
The third ionization energy is 3081kj mol-1.
Element density:11.34g/cm3.
Melting point of single substance: 327.5℃
Simple substance boiling point: 1740.0℃
Atomic radius: 1.8 1 angstrom
Ion radius:1.19 (+2) a.
Covalent radius: 1.47 angstrom
Common compounds: Pb3O4 PbO PbO2:
Name origin: Anglo-Saxon: lead;
The element symbol comes from the Latin word "Plum".
Element Description: Lead
Glossy blue and white metal, very soft and highly plastic.
Source of Elements: It is most commonly found in minerals called galena or lead sulfide (PbS), and occasionally free lead can be found.
Element uses: used for welding, radiation protection, and also used for manufacturing batteries.