periodic table

You'll understand that the periodic table is an organized chart of all known elements arranged by atomic number, and why scientists created it to spot patterns.

You'll learn how atomic number identifies an element and how mass number relates to protons and neutrons, so you can read element information confidently.

You'll discover how properties like atomic size, ionization energy, and electronegativity change as you move across rows and down columns of the periodic table.

You'll grasp how electrons fill orbitals in a predictable order and how this arrangement explains why elements in the same column behave similarly.