Explore how atomic mass changes with atomic number in the periodic table of elements via interactive plots. Periodic table element summary carbon carbon is a chemical element with symbol c and atomic number 6 Classified as a nonmetal, carbon is a solid at 25°c (room temperature). 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 physical properties, biological activities, safety and toxicity information, patents, literature citations and more.
Explore how electronegativity changes with atomic number in the periodic table of elements via interactive plots. Table view is the traditional periodic table any scientist would instantly recognize List view provides a summary view, allowing you to see all properties available for each element at once. Periodic table element summary iodine iodine is a chemical element with symbol i and atomic number 53 Classified as a halogen, iodine is a solid at 25°c (room temperature). Periodic table element summary roentgenium roentgenium is a chemical element with symbol rg and atomic number 111
