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All 118 elements

Element 24 ·transition metal

gè — "chromium"

Chromium

Traditional:

How the character is built

The radical marks this as a metal, and that is not a coincidence of this one character — it holds right across the table. Read the radical first and the element's state at room temperature is already settled. It is (jīn) squeezed into the space beside another component — radicals change shape by position, which is why is hard to spot until you know to look for .

A variant reading luò is recorded but gè is standard in both the mainland and Taiwan.

Where you actually meet it

镀铬 (dùgè) to chrome-plate; chrome plating

The element itself

Chromium is what makes stainless steel stainless: a few percent in the alloy forms an invisible oxide skin that seals the surface and heals itself when scratched. Its only ore of consequence is chromite, and the largest concentrations lie in layered igneous intrusions — bodies of magma that cooled slowly enough to settle into distinct mineral layers, leaving chromite seams that can be followed underground for a hundred kilometres and more, as in the Bushveld of southern Africa. A different, high-grade style of deposit occurs in old ocean-floor rock, of which the Kazakh ores are the classic example.

Where it sits among the 118

Chromium melts at 1907°C (2180 K) — lower than 13 of the 97 elements whose melting point has been measured, and higher than 83. The grey dots are the rest of the table.
In the Earth's crust there is about 100 grams in every tonne of rock. That makes it commoner than 72 of the 93 elements that occur naturally at all. The scale is logarithmic: each gridline is ten times the one below it.

First isolated in 1798.

The full entry

For stroke order, example sentences, audio and the complete set of meanings, see the dictionary entry.

Chromium in the dictionary →

Others built the same way

Every one of these carries , and every one is a metal.

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