How to Write 钸 (bū) — Meaning “plutonium”

Imagine a metal bar (钅) with a piece of cloth (布) wrapped around it, but the cloth is actually radioactive—think "boom" because plutonium is used in bombs. The sound "bū" also reminds me of "boom" with a short u. This visual links the two parts to the dangerous element.

When writing 钸, keep the left radical 钅 narrow and the right part 布 wider for balance. Pay attention to the vertical stroke in 布—it should be straight and slightly longer than the left side. A common mistake is making the right part too small or writing the vertical stroke with a curve.

钸 means plutonium, while 钍 means thorium and 钎 means a brazing rod or drill bit. Visually, 钸 has the right component 布 (five strokes), 钍 has 土 (three strokes), and 钎 has 千 (three strokes). Their pronunciations also differ: bū vs. tǔ vs. qiān.

钸 appears mainly in scientific, nuclear, and technical contexts, such as in words like 钸燃料 (plutonium fuel) or 钸元素 (the element plutonium). It is not used in everyday conversation but is important in chemistry textbooks, news about nuclear energy, or discussions about radioactive materials. There are no special cultural notes because it is a very specialized term.

Common words containing 钸 include: 钸元素 (bū yuán sù) — the element plutonium; 钸燃料 (bū rán liào) — plutonium fuel; 钸金属 (bū jīn shǔ) — plutonium metal.