Interactive periodic table with up-to-date element property data collected from authoritative sources. Look up chemical element names, symbols, atomic masses and other properties, visualize trends, or …

Explore Resources Periodic Table of Elements Classification Browser Search and Analysis Tools Chemical Safety Information

Atomic Energy Levels of the Iron-Period Elements: Potassium through Nickel, J. Sugar and C. Corliss, J. Phys. Chem. Ref. Data 14, Suppl. 2, 1–664 (1985) NIST Physical Measurement Laboratory

Explore how atomic mass changes with atomic number in the periodic table of elements via interactive plots.

PERIODIC TABLE OF ELEMENTS

GHS, the Globally Harmonized System of Classification and Labeling of Chemicals, was developed by the United Nations as a way to bring into agreement the chemical regulations and standards of …

Acetaminophen (paracetamol), also commonly known as Tylenol, is the most commonly taken analgesic worldwide and is recommended as first-line therapy in pain conditions by the World Health …

PERIODIC TABLE OF ELEMENTS Chemical Group Block 18

May 8, 2019 · The periodic table of chemical elements is one of the most recognized tools in science. As we mark the 150th anniversary of the periodic table, the scientific community has declared 2019 to …

Caffeine is a trimethylxanthine in which the three methyl groups are located at positions 1, 3, and 7. A purine alkaloid that occurs naturally in tea and coffee. It has a role as a central nervous system …