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Learn what lattice enthalpy means, how ionic charge and ionic radius determine its magnitude, with comparisons and exam advice for IB Chemistry students.
Read the answerLearn how the octet rule predicts bonding and how incomplete, odd-electron, and expanded-octet species reveal its limitations in IB Chemistry.
Learn what a covalent bond is, how shared electron pairs attract nuclei, and how IB Chemistry distinguishes single, double, and triple bonds in exams.
Learn why ionic compounds have high melting points through lattice structure, electrostatic attraction, ionic charge, and exam-ready IB terminology.
Learn the formulas, charges, names, and use of six common polyatomic ions in ionic formulas and equations for IB Chemistry exam preparation.
Learn why real gases deviate most from ideal behavior at low temperature and high pressure, with particle-level reasoning for IB Chemistry SL and HL exams.
Learn the ideal gas model, its particle assumptions, when real gases deviate, and how to apply PV = nRT correctly in IB Chemistry exam questions.
Learn how to extract mole ratios from balanced chemical equations and apply them in IB Chemistry stoichiometric calculations with a worked example.
Learn why real gases deviate from ideal behavior at low temperature and high pressure using particle volume and intermolecular forces in IB Chemistry.
Learn the IB Chemistry method for converting percentage composition into an empirical formula using moles, ratios, and whole-number scaling.
Learn how to calculate molar concentration from moles and solution volume, with an IB Chemistry example, unit conversions, common errors, and exam advice.
Understand Avogadro's law, its fixed-temperature and pressure conditions, volume-mole relationship, worked example, and IB Chemistry exam pitfalls.
Learn to convert between grams, moles, and particles using molar mass and Avogadro's constant, with an IB Chemistry worked calculation and exam tips.
Learn how empirical and molecular formulas differ, calculate each from composition data, and avoid common IB Chemistry errors in Structure 1.4 exam questions.
Learn how to calculate molar mass from a chemical formula using relative atomic masses, with clear IB Chemistry worked examples, correct units, and exam tips.
Learn what a mole means in IB Chemistry, how it links particles, mass and Avogadro's constant, and how to use it correctly in exam calculations at SL and HL.
Learn the exact value and meaning of the Avogadro constant, how it connects particles to moles, and how to use it in IB Chemistry exam calculations.
Learn how IB Chemistry HL students use a spectrum's convergence limit, Planck's equation and Avogadro's constant to calculate molar ionization energy.
Learn why first ionization energy rises across a period, how effective nuclear charge and shielding explain it, and why key HL exceptions occur in IB Chemistry.
Learn how relative atomic mass differs from relative formula mass, how each is calculated, and how to avoid common IB Chemistry exam errors in mole questions.
Learn how jumps in successive ionization energies reveal valence-electron count, electron configuration, and periodic-table group in IB Chemistry HL.
Learn how to write electron configurations using the Aufbau principle, Hund's rule, and Pauli exclusion principle for IB Chemistry exams.
Learn why chromium and copper adopt unusual electron configurations and how near-equal 3d and 4s sublevel energies explain these exceptions.
Compare spherical s orbitals with dumbbell-shaped p orbitals, including their orientations, nodes, electron capacities, and IB exam conventions.
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