yuánzì Chinese characters of the chemical elements

léi

“thunder”

On its own, an ordinary character; Cantonese leoi4. Readings and gloss from the Unicode Unihan database.

Carries Radium

metal → solid metal
+
léi
=
léi · Ra 88

Transliterates syllable 1 of ra·dium: radiumléi.

The element keeps the component’s reading exactly.