IB Chemistry · · 8
IB Chemistry: Periodic Trend for Atomic Radius
IB Chemistry guide to the periodic trend for atomic radius: why size decreases across a period, increases down a group, plus exam tips and FAQs.
IB Chemistry guide to the periodic trend for atomic radius: why size decreases across a period, increases down a group, plus exam tips and FAQs.
IB Chemistry guide to the pH of a neutral solution at 25°C: why it is 7.00, how Kw sets it, and what changes when temperature changes.
IB Chemistry guide to catalysts: what a catalyst is, how it lowers activation energy, why it isn’t consumed, and how to answer exam questions clearly.
IB Chemistry spectator ions explained: learn how to spot them fast, write net ionic equations, and avoid common exam mistakes with clear examples.
IB Chemistry guide to water’s high surface tension: polarity, hydrogen bonding, cohesion, and exam-ready explanations plus RevisionDojo practice links.
IB Chemistry guide to Le Chatelier’s Principle: learn how equilibrium shifts with concentration, pressure, and temperature, plus exam tips and pitfalls.
IB Chemistry guide to calculate pH from hydrogen ion concentration [H+]. Learn the formula, steps, examples, mistakes and exam tips fast.
IB Chemistry explains why noble gases are inert: full valence shells, high ionization energy, weak forces, and rare xenon exceptions.
IB Chemistry explanation of whether CCl4 is polar or nonpolar. Learn bond dipoles, tetrahedral symmetry, and exam-ready wording in minutes.
IB Chemistry guide to how increasing temperature speeds reaction rate using collision theory, activation energy, and Maxwell-Boltzmann insights.
IB Chemistry guide to electronegativity across a period: learn the trend, the why (nuclear charge, radius, shielding), and exam-ready phrasing.
IB Chemistry guide to lattice energy and ion size: learn the trend, the Coulomb’s law explanation, and exam-ready wording with RevisionDojo practice.
IB Chemistry guide to calculate moles from mass and molar mass. Learn the formula, steps, common mistakes, and exam-ready examples for SL/HL.
IB Chemistry redox reactions explained simply: oxidation vs reduction, electron transfer, oxidation states, agents, and exam tips for SL/HL success.
IB Chemistry catalyst explained: how catalysts lower activation energy, speed rate, and why they don’t shift equilibrium. Includes exam phrasing + links.
IB Chemistry guide to expanded octets: why chlorine can exceed 8 electrons, exam wording, key examples (ClF3, ClF5, ClO4−) and tips.
IB Chemistry guide to Avogadro’s Law: definition, formula, molar volume (22.7 dm³ mol⁻¹), exam traps, and quick practice tips for IB success.
IB Chemistry concentration units explained: mol dm^-3, g dm^-3, ppm, and key conversions. Learn what to write in exams and avoid unit traps.
IB Chemistry activation energy explained with collision theory, energy profiles, catalysts, and exam phrasing. Includes quick checklist + RevisionDojo links.
IB Chemistry explains why helium sits in Group 18: a full 1s² shell, extreme inertness, and noble gas behavior, even without ns²np⁶.
IB Chemistry guide to why metals are malleable: metallic bonding, delocalized electrons, sliding layers, and exam-ready comparisons with ionic solids.
IB Chemistry guide to empirical vs molecular formula: definitions, differences, step-by-step method, exam traps, and a worked example for fast marks.
IB Chemistry vs A-Level Chemistry: which builds real analytical skill? Compare curriculum, assessment, labs, and how to revise smarter for exams.
IB Chemistry integrity made simple: stay safe in experiments, record data honestly, cite sources, and write accurate IA reporting with RevisionDojo.
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