All 118 elements, colour-coded by category. Tap any element to see atomic number, mass, electron configuration, melting/boiling point and discovery year.
The periodic table of elements is one of science's greatest organisational achievements. Dmitri Mendeleev published the first systematic periodic table in 1869, arranging 63 known elements by atomic weight and predicting the existence of undiscovered ones - a remarkable feat of pattern recognition. Today, the table contains 118 confirmed elements, the most recent being Oganesson (element 118), officially named in 2016. Each element is uniquely defined by its atomic number, which equals the number of protons in its nucleus.
The periodic table is a core component of the CBSE Class 10 and Class 12 chemistry syllabus, and understanding its structure - periods, groups, blocks (s, p, d, f), and trends in atomic radius, ionisation energy, and electronegativity - is essential for scoring well in board examinations. The NEET examination, which over 20 lakh students appear for annually to secure MBBS seats, includes a significant number of chemistry questions based on periodic trends. JEE Advanced also tests deep knowledge of element properties, electron configurations, and reactivity patterns.
India has a notable place in the history of chemistry. C.V. Raman's Nobel Prize-winning work in 1930 on light scattering (the Raman Effect) advanced molecular spectroscopy used in elemental analysis. More recently, Indian scientists at BARC (Bhabha Atomic Research Centre) contribute to nuclear physics research related to heavy elements. Element 113, Nihonium, was confirmed in 2015, and current research continues into elements beyond 118 through international collaborations including Indian institutions.