| antimony | (n) a metallic element having four allotropic forms; used in a wide variety of alloys; found in stibnite, Syn. Sb, atomic number 51 |
| barium | (n) a soft silvery metallic element of the alkali earth group; found in barite, Syn. atomic number 56, Ba |
| boron | (n) a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder, Syn. atomic number 5, B |
| cerium | (n) a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group, Syn. Ce, atomic number 58 |
| cesium | (n) a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal, Syn. Cs, caesium, atomic number 55 |
| iodine | (n) a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks), Syn. I, atomic number 53, iodin |
| lanthanum | (n) a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth, Syn. atomic number 57, La |
| praseodymium | (n) a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process, Syn. Pr, atomic number 59 |
| tellurium | (n) a brittle silver-white metalloid element that is related to selenium and sulfur; it is used in alloys and as a semiconductor; occurs mainly as tellurides in ores of copper and nickel and silver and gold, Syn. Te, atomic number 52 |
| tin | (n) a silvery malleable metallic element that resists corrosion; used in many alloys and to coat other metals to prevent corrosion; obtained chiefly from cassiterite where it occurs as tin oxide, Syn. atomic number 50, Sn |
| xenon | (n) a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts, Syn. atomic number 54, Xe |
| 锡 | [xī, ㄒㄧ, 锡 / 錫] tin Sn, metal, atomic number 50; Taiwan pr. xi2 #8,226 [Add to Longdo] |
| 钡 | [bèi, ㄅㄟˋ, 钡 / 鋇] barium Ba, alkaline earth, atomic number 56 #10,566 [Add to Longdo] |
| 碘 | [diǎn, ㄉㄧㄢˇ, 碘] iodine I, halogen with atomic number 53 #10,889 [Add to Longdo] |
| 硼 | [péng, ㄆㄥˊ, 硼] boron B, metalloid, atomic number 5 #26,975 [Add to Longdo] |
| 锑 | [tī, ㄊㄧ, 锑 / 銻] antimony Sb 銻|锑, metalloid, atomic number 51, See also: 銻 #35,263 [Add to Longdo] |
| 铯 | [sè, ㄙㄜˋ, 铯 / 銫] cesium Cs, alkali metal 鹼性金屬|碱性金属 with atomic number 55, See also: 鹼性金屬, 碱性金属 #64,174 [Add to Longdo] |
| 氙 | [xiān, ㄒㄧㄢ, 氙] xenon Xe, noble gas, atomic number 54 #81,753 [Add to Longdo] |
| 碲 | [dì, ㄉㄧˋ, 碲] tellurium Te 碲, metalloid, atomic number 52 #107,613 [Add to Longdo] |
