arsenic: Quick Facts

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A labeled diagram of the periodic table entry for arsenic, showing its atomic number 33, symbol As, atomic weight 74.921595, electron configuration, and classification as an other nonmetal. Additional icons indicate arsenic is solid at room temperature, has a rhombohedral crystal structure, and weakly acidic oxides.

A scientific graph plots average nuclear binding energy per nucleon (in MeV) against atomic mass number, showing a sharp rise at low mass numbers, peaking near iron (Fe), then gradually declining for heavier elements. Key isotopes are labeled along the curve.

Diagram showing atomic structures of native elements: iron as simple cubic packing of spheres, arsenic and antimony as a close-packed model, diamond as a 3D lattice, and graphite as stacked sheets with labeled cleavage planes.

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Topics

gray arsenic arsenic poisoning chemical element nitrogen group element hydrogen carbon sodium nitrogen sulfur phosphorus boron iodine fluorine zinc

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Key People

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Georg Brandt

Swedish chemist

Concept artwork on the periodic table of elements.

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Periodic Table of the elements concept image (chemistry)

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Periodic table of the elements. Left column indicates the subshells that are being filled as atomic number Z increases. The body of the table shows element symbols and Z. analysis and measurement

Periodic Table of the Elements