# S's Periodic Table

> Elements, bonding & compounds

Canonical page: [https://chrome-stats.com/d/id6785322189](https://chrome-stats.com/d/id6785322189)

## Overview

- **ID:** `id6785322189`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** BIN ZHANG
- **Category:** Education
- **Version:** 1.0.1
- **Last updated:** 2026-07-04
- **First published:** 2026-07-02
- **Size:** 971 KB
- **Data as of:** 2026-10-05
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/ss-periodic-table/id6785322189)
- **Privacy policy:** [https://emailzhangbin.github.io/periodex/privacy.html](https://emailzhangbin.github.io/periodex/privacy.html)

## Description

Periodex is made for Grade 9 and 10 students just starting chemistry. It turns the periodic table into an interactive lab where you can explore every element, see how atoms bond, and discover the everyday substances around you - building real knowledge and a feel for how matter works.

PERIODIC TABLE
- All 118 elements with accurate, cross-checked data.
- Tap any element for its Bohr-Rutherford shell model, atomic emission spectrum, and a full property grid - atomic radius, ionization energy, electronegativity, melting and boiling point, and more.
- "Color by" heat-maps reveal periodic trends, each with a plain-language explanation.

BONDING
- See valence electrons, Lewis dot diagrams, and the octet rule.
- Oxidation numbers, common ions, and oxidizing / reducing roles.
- Example compounds for every element.

BUILD A COMPOUND
- Pick two elements - or pick a familiar substance like water, table salt, or dry ice - and watch how they bond.
- Clear, animated diagrams show ionic bonds (electrons transfer, atoms become ions with real + and - charges) and covalent bonds (atoms share pairs) step by step.
- Live electron counts show each atom reaching a full, stable outer shell.
- Every compound has a fact-checked dossier: formula, bond type, physical properties (state, colour, melting / boiling point), common name, and what it is used for.
- Honest about the limits - molecules with advanced bonding are shown as their formula, never as a misleading diagram.

WHY PERIODEX
- Textbook-accurate: element and compound data cross-checked for correctness.
- Designed for the big iPad screen - the table and details sit side by side.
- No ads. No accounts. No data collected. Just chemistry.

Great for Grade 9-12, AP, and IB chemistry - and for anyone who has ever wondered what everyday things are really made of.

## Rankings

- #2,275,444 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6785322189)