Purity:99.9%, 99.95%, 99.99%, 99.995%, 99.999%
Shape:Discs, Plates, Column Targets, Step Targets, Custom-made
Oxygen is a chemical element originated from the Greek ‘oxy’ and ‘genes’ meaning acid-forming. It was first mentioned in 1771 and observed by W. Scheele. The isolation was later accomplished and announced by W. Scheele. “O” is the canonical chemical symbol of oxygen. Its atomic number in the periodic table of elements is 8 with location at Period 2 and Group 16, belonging to the p-block. The relative atomic mass of oxygen is 15.9994(3) Dalton, the number in the brackets indicating the uncertainty.
Zinc is a chemical element originated from the German, ‘zinc’, which may in turn be derived from the Persian word ‘sing’, meaning stone. It was early used before 1000 BC and discovered by Indian metallurgists. “Zn” is the canonical chemical symbol of zinc. Its atomic number in the periodic table of elements is 30 with location at Period 4 and Group 12, belonging to the d-block. The relative atomic mass of zinc is 65.409(4) Dalton, the number in the brackets indicating the uncertainty.