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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 136periodicelementironElement FinderFind an element from its name, symbol, atomic number, or approximate atomic mass.Score 98elementperiodicsymbolSymbol LookupFind full element names and atomic data from element symbols such as K, Fe, or Au.Score 72symbolelementatomicAtomic Number LookupFind an element by atomic number and view its symbol, mass, group, period, and category.Score 66atomicperiodicelementAtomic Weight CalculatorLook up atomic weight and nearest matching elements by approximate atomic mass.Score 56atomicironelementElement State by Temperature CalculatorEstimate whether an element is solid, liquid, or gas at a selected temperature using melting and boiling points.Score 30elementBohr Radius CalculatorCalculate Bohr orbit radius for hydrogen-like atoms.Score 14atomicHydrogen Energy Level CalculatorCalculate hydrogen atom energy levels, transition energy, and emitted or absorbed photon wavelength.Score 12atomicElectron Transition Energy CalculatorCalculate electron transition energy and photon wavelength for hydrogen-like transitions.Score 12atomicQuantum Number CalculatorCheck simple quantum number ranges, shell capacity, and orbital counts.Score 12atomicMolecular Weight CalculatorCalculate approximate molecular weight from element masses and atom counts.Score 8elementatomicCarbon Footprint CalculatorEstimate monthly carbon footprint from transport, electricity, gas, flights, and waste.Score 4ironCar CO2 CalculatorEstimate vehicle CO2 emissions from distance and emissions factor.Score 4ironFlight CO2 CalculatorEstimate flight emissions from distance, passenger factor, and radiative forcing multiplier.Score 4ironHome Energy CO2 CalculatorEstimate home energy emissions from electricity and gas usage.Score 4ironWater Usage CalculatorEstimate household water usage from people, daily use, garden use, and days.Score 4ironPlastic Waste CalculatorEstimate plastic waste from items used, item weight, and recycling rate.Score 4ironRecycling Impact CalculatorEstimate CO2 savings from recycled material weight and savings factor.Score 4ironElectricity CO2 CalculatorEstimate electricity-related emissions from kWh and grid factor.Score 4ironSolar CO2 Saving CalculatorEstimate CO2 savings from solar generation and grid emission factor.Score 4iron