Search results
Results From The WOW.Com Content Network
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 .
This is a list of chemical elements and their atomic properties, ordered by atomic number (Z). ... atomic mass Electronegativity ... Arsenic: As: 74.92160(2) 2.18: 9. ...
Standard atomic weight A r ° ... Arsenic (33 As) has 32 known isotopes and at least 10 isomers. Only one of these ... Isotopic mass [4] [n 2] [n 3] Half-life [1] Decay
Spectral lines of arsenic: Other properties; ... (extends period 8 when atomic number ≥ 119. ... mass number comment: mass number comment:
The soils hold 1 to 10 parts per million of arsenic, and seawater carries 1.6 parts per billion of arsenic. Arsenic comprises 100 parts per billion of a typical human by weight. Some arsenic exists in elemental form, but most arsenic is found in the arsenic minerals orpiment, realgar, arsenopyrite, and enargite. [14]
A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
When atomic mass is shown, it is usually the weighted average of naturally occurring isotopes; but if no isotopes occur naturally in significant quantities, the mass of the most stable isotope usually appears, often in parentheses. [8] In the standard periodic table, the elements are listed in order of increasing atomic number.