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wikipedia.org
en.wikipedia.org
Caesium adalah ejaan yang direkomendasikan oleh International Union of Pure and Applied Chemistry(IUPAC).[2]American Chemical Society (ACS) telah menggunakan ejaan cesium sejak tahun 1921,[3][4] sesuai Webster's New International Dictionary. Unsur ini diambil dari bahasa Latin caesius, yang berarti "abu-abu kebiruan". Penjelasan lebih lanjut tentang perbedaan ejaan dapat dilihat di ae/oe vs e.