The team at periodicvideos has created a TED-Ed Lesson for every element of the periodic table. This one is about arsenic -- element number 33 and is famous for the toxicity of its compounds.
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Arsenic - Periodic Table of Videos: With Neil Barnes, Brady Haran, Martyn Poliakoff. Arsenic has been associated with poisoning for centuries and the Professor has some doozies of stories to share. Of course he also includes the chemistry with Neal perfo
Synonyms Arsenicals ; Organic and inorganic arsenic Definition Arsenic is a chemical element with the symbol As on the periodic table along with nitrogen, phosphorus, antimony, and bismuth. The atomic number of arsenic is 33 and the relative atomic mass is 74.92. Naturally occurring arsenic is ...
Arsenic is a gray-appearing chemical element (atomic number 33, symbol "As" in the periodic table) also termed a metalloid. Arsenic can exist in a metallic state in three forms (yellow, black, and gray; with gray predominating) and in ionic forms. Arsenic is considered to be a heavy me...
Arsenic (As) lies directly below P on the periodic table and so the two elements share many chemical properties, although their chemistries are sufficiently dissimilar that As cannot directly replace P in modern biochemistry. Arsenic is toxic precisely because As and P are similar enough that ...
Arsenic is a semi-metal element in the periodic table. It is odorless and tasteless. Arsenic occurs naturally in rocks and soil, water, air, and plants and animals. It can be further released into the environment through natural activities such as volcanic action, erosion of rocks and forest...
Arsenic is very similar chemically to its predecessor in the Periodic Table, phosphorus. Like phosphorus, it forms colourless, odourless, crystalline oxides As2O3 and As2O5 which are hygroscopic and readily soluble in water to form acidic solutions. Arsenic(V) acid is a weak acid. Like phospho...
It belongs to Group V-A of the periodic table, has an atom. wt. of 74.92, and closely resembles phosphorus chemically. Gray As, the ordinary stable form, has a density of 5.73 g cm 3 , a melting pt. of 817 C, and sublimes at 613 C. The more common oxidation states for As are...
Minimize acquisition time where possible or collect data from several different locations on the sample (with very short acquisition times) and integrate the data. Interpretation of XPS spectra As3d peak has overlapping spin-orbit components (Δ=0.7eV, intensity ratio=0.7). As LMM peak...