Gāngguǒ shì shìjiè shàng zuìdà de gǔ shēngchǎn guó.
Congo is the world's largest cobalt producer.
Tips
memory
Radical 钅 (metal) marks it as a metal element — same as 铁 (iron), 铜 (copper), 锌 (zinc), 镍 (nickel). The phonetic 古 (gǔ, 'ancient') gives the reading. Almost all chemical-element names follow this 钅+phonetic pattern.
register
In Taiwan, the alternate reading gū is also accepted, but mainland-standard pinyin is gǔ.