PRESENTATION OUTLINE
STANDARD ATOMIC WEIGHT-78.9721
ITS MELTING POINT IS 494k
Selenium has six naturally occurring isotopes, five of which are stable.
STANDARD ATOMIC WEIGHT- 51.9961
The name of the element is derived from the Greek word χρῶμα, chrōma, meaning colour.
STANDARD ATOMIC WEIGHT-55.845
Nickel was first isolated and classified as a chemical element.
STANDARD ATOMIC WEIGHT- 32.06
Sulfur occurs naturally as the pure element.
STANDARD ATOMIC WEIGHT-127.60
Commercially, the primary use of tellurium is in alloys, foremost in steel and copper to improve machinability.
STANDARD ATOMIC WEIGHT-92.90637
Niobium has physical and chemical properties similar to those of the element tantalum, and the two are therefore difficult to distinguish.
