Interactive Periodic Table

Explore the periodic table of elements with detailed information for each element.

nonmetal
noble gas
alkali
alkaline
transition
post trans
metalloid
halogen
What is This Tool?

The periodic table organizes all 118 known chemical elements by increasing atomic number, arranged in rows (periods) and columns (groups) that reflect recurring chemical properties. Elements in the same group share similar properties because they have the same number of valence electrons.

Formula
Key element properties: Atomic Number (Z) = number of protons Atomic Mass = weighted average of isotope masses Electron Configuration = distribution of electrons in orbitals Electronegativity = ability to attract electrons (Pauling scale) Groups: 1-18 (columns), Periods: 1-7 (rows)
Worked Examples

1. Find element by symbol

Given: Search for 'Fe'

Locate Iron (Fe) in period 4, group 8

Atomic number: 26

Atomic mass: 55.845 u

Result: Iron (Fe) - transition metal, essential for hemoglobin

2. Compare alkali metals

Given: Group 1 elements

Li, Na, K, Rb, Cs, Fr

All have 1 valence electron

Reactivity increases down the group

Result: Highly reactive metals that form +1 ions

Frequently Asked Questions