Periodic trends reference →
A printable guide to atomic radius, ionization energy and electronegativity, with the reasoning behind the patterns and key exceptions.
Open printable referenceChemistry printables
Free reference sheets, periodic tables and chemistry worksheets. Keep a reference beside you while you study, or use a worksheet to check what you know.
Keep the essentials handy
Review the main ideas without searching through a full lesson. These sheets bring together useful tables, a worked example and common exceptions.
Open a sheet, select A4 or Letter, then print or save it as a PDF. Each includes scientific sources and a link to the full lesson.
Common ions & charges →
Print common monatomic and polyatomic ion formulas, charge-balancing examples, and the distinction between ionic charge and oxidation state.
Open printable referenceElectron configuration reference →
A printable electron-configuration guide with subshell capacities, filling order, noble-gas cores, orbital rules, and common exceptions.
Open printable referencePeriodic tables
SVG files stay sharp at any size. Open a downloaded file in a browser, choose landscape, and fit it to A4 or Letter paper.
To save a table as a PDF or create a wallpaper, open the table’s download tools.
Data sources and conventions →Black & white table
A clear, low-ink table of all 118 elements. Keep it beside your work or use it to check the blank practice grid.
Download SVG →Blank practice grid
Atomic numbers are supplied. Fill in the symbols and names, then check against the complete table.
Download SVG →Element family chart
Elements grouped by the same family colors used on the interactive table. The SVG stays sharp when resized for slides or posters.
Download SVG →Electronegativity chart
See how Pauling electronegativity values vary across the table. Pale-grey tiles mean no electronegativity value is provided; they do not mean zero.
Download SVG →Practice by topic
Each worksheet contains four questions and space for reasoning. Select A4 or Letter, and choose whether to include the answer key before printing or saving a PDF.
Periodic trends →
Explain trends using shells, shielding and nuclear attraction.
Read the lesson firstValence electrons & ions →
Use group numbers to count main-group valence electrons.
Read the lesson firstProtons, neutrons & electrons →
Read isotope notation and calculate particle counts.
Read the lesson firstElectron configuration →
Write configurations and check the electron total.
Read the lesson firstLewis structures & polarity →
Move from a Lewis structure to a molecular shape.
Read the lesson firstMolar mass →
Count atoms in formulas with parentheses and hydrates.
Read the lesson firstElement families →
Locate the major families using IUPAC group numbers.
Read the lesson first