Arsenic - Element information, properties and uses | Periodic Table
Elements are organised into blocks by the orbital type in which the outer electrons are found. These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f).
Arsenic - Wikipedia
Arsenic is a chemical element with the symbol As and the atomic number 33. It is a metalloid and one of the pnictogens, and therefore shares many properties with its group 15 neighbors phosphorus and antimony. Arsenic is a notoriously toxic heavy metal.
WebElements Periodic Table » Arsenic » the essentials
Elemental arsenic occurs in two solid modifications: yellow, and grey or metallic, with specific gravities of 1.97, and 5.73, respectively. The element is a steel grey, very brittle, crystalline, semimetallic (metalloid) solid. It tarnishes in air, and when heated rapidly oxidises to arsenous oxide which has a garlic odour.
Arsenic | As (Element) - PubChem
Arsenic is used in bronzing, pyrotechny, and for hardening and improving the sphericity of shot. The most important compounds are white arsenic, the sulfide, Paris green, calcium arsenate, and lead arsenate; the last three have been used as agricultural insecticides and poisons.
Arsenic (As) - Periodic Table
Arsenic has thirty-three protons and forty-two neutrons in its nucleus, and thirty-three electrons in four shells. It is located in group fifteen, period four and block p of the periodic table. Metalloid element of group 15. There are three allotropes, yellow, black, and grey. Reacts with halogens, concentrated oxidizing acids and hot alkalis.
Arsenic (As) - Periodic Table
Crystals of elemental (native) arsenic are found in nature, although rare. Arsenic is a chemical element of the periodic table with chemical symbol As and atomic number 33 with an atomic weight of 74.9216 u and is classed as a metalloid.
Chemistry of Arsenic (Z=33) - Chemistry LibreTexts
2019年7月12日 · Arsenic is situated in the 33rd spot on the periodic table, right next to Germanium and Selenium. Arsenic has been known for a very long time and the person who may have first isolated it is not …
Arsenic | Definition, Symbol, Uses, & Facts | Britannica
2024年11月8日 · Arsenic, a chemical element in the nitrogen group (Group 15 [Va] of the periodic table), existing in both gray and yellow crystalline forms. Its chemical symbol is As, and it was first clearly identified as a free substance in 1649 by German pharmacist Johann Schroeder.
Arsenic (As) – Periodic Table (Element Information & More)
2024年9月1日 · Arsenic element is in group 15 and period 4 of the Periodic table. Arsenic is the p-block element and it belongs to Pnictogens group. Click on above elements (in Periodic table) to see their information. Why is Arsenic in Group 15? Do you know, how many electrons can be accommodated in the first shell, second shell, third shell, fourth shell, etc…?
Arsenic - Toxic, Reactions, Compounds | Britannica
2024年11月8日 · The toxicity of arsenic and its compounds varies widely, ranging from the exceedingly poisonous arsine and its organic derivatives (see arsenic poisoning) to elemental arsenic itself, which is relatively inert. Arsenical compounds in general are skin irritants, which easily cause dermatitis.