Periodic data
Jump into element names, atomic masses, periodic trends, and radii.
IB Chemistry data booklet
SL + HL
Search equations, constants, and reference tables from the IB Chemistry data booklet — with symbol definitions, unit tips, and quick filters to find what you need for exams.
Start here
Common chemistry lookups
Equations and constants
Start with formulas, constants, SI multipliers, and unit conversions.
Bonding and energetics
Find bond lengths, bond enthalpies, lattice enthalpies, and thermodynamic data.
Identification and lab work
Use spectroscopy, indicators, reduction potentials, and uncertainty rules.
At a glance
Visual references
7
The periodic table
Relative atomic masses for all elements.
Lanthanides
Actinides
5
Electromagnetic spectrum
Wavelength ranges for UV, visible, IR, and other regions.
Wavelength increases to the right; energy increases to the left. Visible light spans roughly 400–700 nm (4×10⁻⁷–7×10⁻⁷ m).
gamma rays
X-rays
UV
visible
IR
microwaves
radio waves
- gamma rays · 10^{-16} – 10^{-11} m
- X-rays · 10^{-11} – 10^{-8} m
- UV · 10^{-8} – 4×10^{-7} m
- visible · 4×10^{-7} – 7×10^{-7} m
- IR · 7×10^{-7} – 10^{-3} m
- microwaves · 10^{-3} – 10^{-1} m
- radio waves · 10^{-1} – 10^{8} m
15
Colour wheel and visible wavelengths
Visible spectrum wavelength boundaries.
Wavelength boundaries for the visible spectrum. The colour absorbed by a transition metal complex is complementary to the colour observed.
Red
647–700 nm
Complementary: Cyan / green
Orange
585–647 nm
Complementary: Blue
Yellow
575–585 nm
Complementary: Violet / blue
Green
491–575 nm
Complementary: Red / magenta
Blue
424–491 nm
Complementary: Orange / yellow
Violet
400–424 nm
Complementary: Yellow / green
Complete booklet index
23 sections
Frequently Asked Questions
Free IB practice
Turn data booklet lookup into exam-ready practice
Use real IB-style Chemistry questions to practise by subject, topic, and subtopic. Get instant feedback and analytics that show what to work on next. Free to start.
Independent study reference by Baccalytics — not affiliated with or endorsed by the International Baccalaureate Organization. Numerical values align with commonly published references (e.g. NIST WebBook, CRC Handbook) cited in the official booklet. Always verify against your official IB Chemistry data booklet for examinations.