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.

2024年12月29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.

Element Arsenic (As), Group 15, Atomic Number 33, p-block, Mass 74.922. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

2023年12月3日 · Arsenic is a chemical element with the symbol As and atomic number 33, making it a part of the pnictogen or nitrogen group in the periodic table. This metalloid element is notorious for its toxicity.

Arsenic is a chemical element with symbol As and atomic number 33. Classified as a metalloid, Arsenic is a solid at room temperature. [Ar]4s 2 3d 10 4p 3. J.C. Slater, J Chem Phys, 1964, 41 (10), 3199-3205. DOI:10.1063/1.1725697.

Despite its potential toxicity, arsenic is also an essential element, necessary to our physiology. A level of 0.00001% is needed for growth and for a healthy nervous system. Abundance earth’s crust: 1.8 parts per million by weight, 0.5 parts per million by moles.

2023年5月4日 · Arsenic is the metallic element with the atomic number 33 and is represented by the symbol ‘As’ in the periodic table. It is classified as a metalloid and belongs to the p-block of group 15 of the periodic table.

Arsenic is the 33rd element in the periodic table and has a symbol of As and atomic number of 33. It has an atomic weight of 74.92159 and a mass number of 75. Arsenic has thirty-three protons and forty-two neutrons in its nucleus, and thirty-three electrons in four shells.

2024年12月29日 · In its most stable elemental state, arsenic is a steel-gray, brittle solid with low thermal and electrical conductivity. Although some forms of elemental arsenic are metal-like, the element is best classified as a nonmetal.

Arsenic is one of the most ancient element known to human history. It is very toxic and can enter the biological system through contaminated water, soil and air. History and Discovery. Arsenic has a been known since prehistoric time and in the Bronze …