Periodic Table

What this tool does

Periodic Table shows every known element from hydrogen to oganesson in the standard layout, searchable by name, symbol or atomic number, and colourable by chemical category, block, state at room temperature, or electronegativity. A sortable list view and CSV/JSON export make it easy to pull element data for a worksheet or assignment.

A printed periodic table is static: it shows one colour scheme and cannot be searched, filtered or exported. Students and anyone writing chemistry content regularly need to look up a specific element’s properties, compare several elements at once, or pull a clean dataset into a spreadsheet.

This tool lays out all 118 confirmed elements in the standard periodic table grid, with the lanthanide and actinide rows placed below as is conventional. Clicking any element shows its full detail panel: atomic mass, category, group and period, electron configuration, electronegativity and state at standard temperature and pressure. Colouring the whole table by category, block, phase or electronegativity makes patterns across the table visible at a glance, and a list view with CSV and JSON export supports pulling the data out for other use.

How to use Periodic Table

1. Search by typing a name, chemical symbol or atomic number into the search box.
2. Choose a Colour by mode: Category, Block, State at STP, or Electronegativity to see different patterns across the table.
3. Click any element tile to open its detail panel below the table.
4. Use the Previous and Next links in the detail panel to step through elements by atomic number.
5. Switch View to List for a sortable table of every matching element.
6. Download the current list as CSV or JSON once you have searched or filtered to the elements you need.

Tips for better results

• Click a category chip above the table while in Category colour mode to highlight only elements in that group, such as all noble gases at once.
• Electronegativity colouring only applies to elements with an established value; elements shown in grey have no commonly agreed figure.
• The two placeholder cells reading 57-71 and 89-103 mark where the lanthanide and actinide rows belong in the full-width layout; they are shown separately below for readability, exactly as most printed tables do.
• Export to CSV when you need the data in a spreadsheet, or JSON when integrating it into another tool or script.

Common use cases

• Looking up a specific element’s atomic mass, electron configuration or electronegativity while studying or writing chemistry content.
• Comparing elements within a category, block or electronegativity range for a classroom lesson.
• Exporting a filtered list of elements as CSV or JSON for a worksheet, dataset or further processing.
• Quickly stepping through elements in atomic-number order for a review session.

Common mistakes to avoid

• Assuming every element has a well-established electronegativity value; several, especially among the heaviest synthetic elements, have no commonly agreed figure and are shown without a colour under that mode.
• Treating radioactive elements’ listed atomic mass as a fixed constant; for elements without a stable isotope, the figure shown is the mass number of the most stable known isotope, which can be revised as research continues.
• Forgetting that newer, very heavy synthetic elements have limited experimentally confirmed chemistry; some properties for the far end of the table are better-established theoretically than observationally.