IUPAC rules The temporary names derive systematically from the element's atomic number, and apply only to 101 ≤ Z ≤ 999. Each digit is translated into a "numerical root" according to the table. The roots are concatenated, and the name is completed by the suffix -ium. Some of the roots are Latin and others are Greek, to avoid two digits starting with the same letter (for example, the Greek-derived pent is used instead of the Latin-derived quint to avoid confusion with quad for 4). There are two elision rules designed to prevent odd-looking names.
IUPAC rules The temporary names derive systematically from the element's atomic number, and apply only to 101 ≤ Z ≤ 999. Each digit is translated into a "numerical root" according to the table. The roots are concatenated, and the name is completed by the suffix -ium. Some of the roots are Latin and others are Greek to avoid two digits starting with the same letter (for example, the Greek-derived pent is used instead of the Latin-derived quint to avoid confusion with quad for 4). There ar,e two elision rules designed to prevent odd-looking names.