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, …

PubChem is the world's largest collection of freely accessible chemical information. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and …

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

PERIODIC TABLE OF ELEMENTS Chemical Group Block 17 Atomic Number Cl Symbol Chlorine Name Halogen Chemical Group Block 1 H Hydrogen Nonmetal 1 1 2 He Helium Noble Gas

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

Relative atomic mass is the ratio of the average mass of the atom to the unified atomic mass unit (symbol: u) or dalton (symbol: Da), which is defined as one twelfth of the mass of a carbon-12 …

The PTMI was not reviewed at the current meeting. At the request of the thirteenth session of CCCF for more comprehensive occurrence data for cadmium in food, the JECFA Secretariat …

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

Adults: Sudden deaths, stroke, and myocardial infarction have been reported in adults taking stimulant drugs at usual doses for ADHD. Although the role of stimulants in these adult cases …

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