Periods
Rows are called periods. As you move across a row, atomic number increases and properties shift in a regular way.
Chemistry · Lesson 01
Periodic Table of Elements
Every substance in the universe is built from atoms of pure elements. Use the temperature slider, category filters, and property lenses to read the table like a living map, then click any element to inspect its shell model, matter state, crystal behavior, and real-world uses.
How to read the table
The periodic table is arranged by atomic number. That means every step to the right adds one proton, and the layout reveals repeating patterns in chemical behavior.
Groups
Columns are groups. Elements in the same group often have similar outer electron patterns, so they react in related ways.
Families
Labels like alkali metals, halogens, and noble gases help chemists predict reactivity, bonding, and other shared traits.
Patterns
Metals mostly appear on the left, nonmetals cluster on the right, and the staircase region between them holds the metalloids.
Electron Shell Model
Electron motion speeds up as electronegativity increases.
Crystal Structure Preview
Metals tend to form repeating lattices, while gases spread apart.