Chemistry
Atom Calculator
Find protons, neutrons and electrons from atomic number, mass number and ionic charge, with worked examples and input checks.
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Chemistry calculators for atomic structure, isotope masses, electron configurations, shielding and ionic formulas. Start with particle counts, distinguish mass number from weighted atomic mass, and follow worked guides into bonding and nomenclature. Each tool states its supported inputs, method and limits.
Chemistry
Atomic Mass Calculator
Estimate atomic mass from proton and neutron counts, convert u to kg, and understand why mass number is not measured isotope mass.
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Average Atomic Mass Calculator
Calculate a weighted average from isotope masses and percentage abundances, with a strict 100% abundance check and worked calculation.
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Bond Order Calculator
Find molecular orbital bond order using bonding and antibonding electron counts, with examples and clear limits on interpretation.
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Chemical Name Calculator
Build names and balanced formulas for supported ionic compounds using cations and anions, including variable-charge metals and polyatomic ions.
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Effective Nuclear Charge Calculator
Estimate effective nuclear charge with Slater’s rules for occupied subshells of neutral H–U atoms, including a shielding breakdown.
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Electron Configuration Calculator
Find full and noble-gas ground-state electron configurations for neutral H–U atoms, with shell populations and recognised filling exceptions.
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