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Interactive Periodic Table of Elements

Explore all 118 chemical elements with category filtering (alkali metals, halogens, noble gases, etc.), IUPAC blocks (s, p, d, f), electronegativity, ionization energies, oxidation states, density, melting/boiling points, and electron configurations.

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Interactive Periodic Table & Molar Mass Studio

Explore all chemical elements with live temperature phase changes, electron shells, and a precision molecular formula weight calculator.

Temperature:298 K (25°C)

Atomic #1

Hydrogen (H)

Reactive Nonmetal

State at 298K:Gas

Atomic Mass:1.008 u

Electron Configuration:1s¹

Electronegativity (Pauling):2.2

Melting Point:14.01 K (-259.1°C)

Boiling Point:20.28 K (-252.9°C)

What is the Modern Periodic Table?

The modern periodic table organizes the 118 known chemical elements according to increasing atomic number (Z), electron configurations, and recurring chemical properties.

Elements aligned in the same vertical column (group) exhibit similar valence electron arrangements and chemical reactivities, while horizontal rows (periods) reflect consecutive electron shell filling.

Formula & Step-by-Step Calculation

Z = \text{Protons} = \text{Electrons (neutral)}, \quad A \approx Z + N, \quad \text{Configuration: } 1s^2 2s^2 2p^6 \dots

Aufbau principle, Hund's rule, and Pauli exclusion principle govern electron orbital occupancy.

Worked Step-by-Step Examples

Example 1

Inspect Iron (Fe, atomic number 26)

Solution: Atomic weight 55.845 u, [Ar] 3d⁶ 4s², Transition Metal, Electronegativity 1.83

• Group 8, Period 4, d-block transition metal.

• Density 7.874 g/cm³, Melting point 1811 K (1538 °C).

Common Real-World & Academic Use Cases

✓ Chemistry class and laboratory element lookup
✓ Balancing redox reactions and determining valence states
✓ Electronegativity comparison for bond polarity prediction
✓ Molar mass calculations and isotope considerations

How to Use the Interactive Periodic Table of Elements

Filter by Element Family

Highlight Alkali Metals, Transition Metals, Lanthanides, Halogens, or Noble Gases.

Select an Element

Click any element tile in the 18-column grid to open its comprehensive physical and atomic profile.

Review Properties

Inspect electron configurations, ionization energy, electronegativity, density, and melting point.

Frequently Asked Questions

Q: What do the colors represent on the periodic table?

Colors represent chemical families and IUPAC classifications: alkali metals, alkaline earths, transition metals, post-transition metals, metalloids, reactive nonmetals, halogens, noble gases, lanthanides, and actinides.

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