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尉钰涵 / Yuhan Wei

尉钰涵 / Yuhan Wei

co-leaderdesigner

I am Yuhan Wei, one of the leaders of this website. I joined the chemistry club in Grade 10, and after the second semester of Grade 10 ended, I began running the chemistry club public account together with three other club members. On the public account, we publish explanations of the principles behind the chemistry club's weekly experiments as well as process photos. We also post popular-science articles about chemistry in everyday life and research-style articles related to waste recycling during weekends or in our spare time. I hope that through the "Second High Chem Club" public account, more people will become interested in chemistry and be able to use chemical knowledge to solve problems in daily life.

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Contributed Articles

Flame Tests

Why do different metals produce different colors in a flame? This article explains flame tests from the perspective of spectra and energy transitions.

"Heart of the Ocean": Changes in Chromium Oxidation States

"Heart of the Ocean" is a striking color-change experiment. By adding hydrogen peroxide and dilute sulfuric acid to potassium chromate solution, the colors rapidly shift through yellow, orange, blue, and green, revealing chromium in different oxidation states.

The 2025 Nobel Prize in Chemistry

The 2025 Nobel Prize in Chemistry honors breakthroughs related to MOFs. This article introduces the laureates, the science behind metal-organic frameworks, and why these porous materials matter.

Iron's Dual Identity

Is iron more commonly +2 or +3, and why? Starting from electron configuration and Hund’s rule, this article explains the two common oxidation states of iron in chemistry and daily life.

Golden Rain

In this classic experiment, lead ions and iodide ions form bright yellow lead iodide crystals that fall like golden rain. This article explains the phenomenon and the chemistry behind it.

Neanderthals and Chemistry

Neanderthals lived in Europe and western Asia tens of thousands of years ago. This article explores the chemistry behind their tools, fire use, and painting materials.

AP Chemistry: Electron Configuration

AP Chemistry: Electron configuration. This article explains how electrons are arranged outside the nucleus, from shells to subshell notation, and why electron configuration matters for understanding atomic structure and chemical behavior.