| aluminum | (n) a silvery ductile metallic element found primarily in bauxite, Syn. atomic number 13, Al, aluminium |
| argon | (n) a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere, Syn. Ar, atomic number 18 |
| bohrium | (n) a transuranic element, Syn. element 107, Bh, atomic number 107 |
| chlorine | (n) a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water), Syn. Cl, atomic number 17 |
| darmstadtium | (n) a radioactive transuranic element, Syn. atomic number 110, element 110, Ds |
| dubnium | (n) a transuranic element, Syn. element 105, hahnium, Db, atomic number 105 |
| fermium | (n) a radioactive transuranic metallic element produced by bombarding plutonium with neutrons, Syn. Fm, atomic number 100 |
| hassium | (n) a radioactive transuranic element, Syn. Hs, atomic number 108, element 108 |
| hydrogen | (n) a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe, Syn. atomic number 1, H |
| lawrencium | (n) a radioactive transuranic element synthesized from californium, Syn. atomic number 103, Lr |
| magnesium | (n) a light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine), Syn. Mg, atomic number 12 |
| meitnerium | (n) a radioactive transuranic element, Syn. atomic number 109, element 109, Mt |
| mendelevium | (n) a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol), Syn. atomic number 101, Mv, Md |
| neon | (n) a colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts, Syn. Ne, atomic number 10 |
| nobelium | (n) a radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known, Syn. atomic number 102, No |
| phosphorus | (n) a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells; is highly reactive and occurs in several allotropic forms, Syn. atomic number 15, P |
| potassium | (n) a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite, Syn. atomic number 19, K |
| roentgenium | (n) a radioactive transuranic element, Syn. atomic number 111, element 111, Rg |
| rutherfordium | (n) a radioactive transuranic element which has been synthesized, Syn. Unq, atomic number 104, element 104, unnilquadium, Rf |
| seaborgium | (n) a transuranic element, Syn. atomic number 106, element 106, Sg |
| silicon | (n) a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors, Syn. Si, atomic number 14 |
| sodium | (n) a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt), Syn. Na, atomic number 11 |
| sulfur | (n) an abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions), Syn. atomic number 16, S, sulphur |
| ununbium | (n) a radioactive transuranic element, Syn. Uub, atomic number 112, element 112 |
| ununhexium | (n) a radioactive transuranic element, Syn. atomic number 116, element 116, Uuh |
| ununpentium | (n) a radioactive transuranic element, Syn. atomic number 115, element 115, Uup |
| ununquadium | (n) a radioactive transuranic element, Syn. Uuq, atomic number 114, element 114 |
| ununtrium | (n) a radioactive transuranic element, Syn. element 113, Uut, atomic number 113 |
| 铝 | [lǚ, ㄌㄩˇ, 铝 / 鋁] aluminum Al, metal, atomic number 13 #3,564 [Add to Longdo] |
| 钠 | [nà, ㄋㄚˋ, 钠 / 鈉] sodium Na, alkali metal 鹼性金屬|碱性金属 with atomic number 11, See also: 鹼性金屬, 碱性金属 #6,688 [Add to Longdo] |
| 磷 | [lín, ㄌㄧㄣˊ, 磷] phosphorus P, nonmetal, atomic number 15; water in rocks #7,431 [Add to Longdo] |
| 氯 | [lǜ, ㄌㄩˋ, 氯] chlorine Cl, halogen with atomic number 17 #8,221 [Add to Longdo] |
| 氖 | [nǎi, ㄋㄞˇ, 氖] neon Ne, noble gas, atomic number 10 #8,870 [Add to Longdo] |
| 钾 | [jiǎ, ㄐㄧㄚˇ, 钾 / 鉀] potassium K, alkali metal 鹼性金屬|碱性金属 with atomic number 19, See also: 鹼性金屬, 碱性金属 #9,022 [Add to Longdo] |
| 镁 | [měi, ㄇㄟˇ, 镁 / 鎂] magnesium Mg, alkaline earth metal, atomic number 12 #10,784 [Add to Longdo] |
| 氢 | [qīng, ㄑㄧㄥ, 氢 / 氫] hydrogen H, atomic number 1 #10,793 [Add to Longdo] |
| 硫 | [liú, ㄌㄧㄡˊ, 硫] sulfur S, nonmetal, atomic number 16 #10,873 [Add to Longdo] |
| 硅 | [guī, ㄍㄨㄟ, 硅] silicon Si, metalloid, atomic number 14 #11,266 [Add to Longdo] |
| 氩 | [yà, ㄧㄚˋ, 氩 / 氬] argon Ar, noble gas, atomic number 18 #32,260 [Add to Longdo] |
| 燐 | [lín, ㄌㄧㄣˊ, 燐] variant of 磷, phosphorus P, nonmetal, atomic number 15, See also: 磷 #97,578 [Add to Longdo] |
