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Interactive Periodic Table & Element FinderSearch elements by name, symbol, atomic number, or approximate atomic mass, then view atomic data and temperature state estimates.Score 104periodicelementatomicElement FinderFind an element from its name, symbol, atomic number, or approximate atomic mass.Score 80elementatomicperiodicAtomic Number LookupFind an element by atomic number and view its symbol, mass, group, period, and category.Score 66atomicperiodicelementBohr Radius CalculatorCalculate Bohr orbit radius for hydrogen-like atoms.Score 52radiusatomicAtomic Weight CalculatorLook up atomic weight and nearest matching elements by approximate atomic mass.Score 46atomicelementchemistrySymbol LookupFind full element names and atomic data from element symbols such as K, Fe, or Au.Score 46elementatomicchemistryElement State by Temperature CalculatorEstimate whether an element is solid, liquid, or gas at a selected temperature using melting and boiling points.Score 34elementchemistryMolarity CalculatorCalculate solution molarity from moles and volume.Score 22chemistrypH CalculatorCalculate pH from hydrogen ion concentration.Score 22chemistryIdeal Gas Law CalculatorCalculate moles of gas using pressure, volume, and temperature.Score 22chemistryMolecular Weight CalculatorCalculate approximate molecular weight from element masses and atom counts.Score 20chemistryatomicelementDilution CalculatorCalculate stock volume needed using C1V1 = C2V2.Score 14chemistryCircle Area CalculatorCalculate circle area and circumference from radius.Score 14radiusCircle CalculatorCalculate circle area, circumference, and diameter from radius.Score 12radiusMolality CalculatorCalculate molality from moles of solute and kilograms of solvent.Score 12chemistryMole CalculatorCalculate moles from mass and molar mass.Score 12chemistryAvogadro's Number CalculatorConvert moles to particles using Avogadro's number.Score 12chemistryStoichiometry CalculatorEstimate product moles from reactant moles and balanced equation coefficients.Score 12chemistrypOH CalculatorCalculate pOH from hydroxide concentration and pH relationship.Score 12chemistryBoyle's Law CalculatorCalculate final pressure or volume for constant-temperature gas changes.Score 12chemistry