Read More
Date: 4-3-2017
920
Date: 1-4-2019
1269
Date: 13-3-2019
940
|
Chemistry of Arsenic
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 known but credit generally is given to Albertus Magnus in about the year 1250. The element, which is classified as a metalloid, is named from the Latin arsenicum and Greek arsenikon which are both names for a pigment, yellow orpiment.
Arsenic played a major role in the Bronze Age, as it was added to bronze as a strengthener.
Atomic number | 33 |
Atomic symbol | As |
Atomic weight | 74.92 |
Classification | Metalloids |
Electron Configuration | [Ar]4s23d104p3 |
Phase | Solid |
Density | 5.727 g/cm3 |
Oxidation States | 5,3,2,1,-3 |
Crystal Structure | rhombohedral |
|
|
علامات بسيطة في جسدك قد تنذر بمرض "قاتل"
|
|
|
|
|
أول صور ثلاثية الأبعاد للغدة الزعترية البشرية
|
|
|
|
|
العتبة الحسينية تطلق فعاليات المخيم القرآني الثالث في جامعة البصرة
|
|
|