(1) Callahan posits that chemical elements radiate electromagnetic signals.

(2) For example, the natural arrangement of the chemical elements in Mendeleyev's periodic table has groups of traits reappearing cyclically.

(3) Although a rock is a collection of the chemical elements that make it up, those elements are not distributed randomly.

(4) Several chemical elements decay with age, producing radioactivity in the process.

(5) Radium is a chemical element.

(6) The discovery of the chemical element a happy accident.

(7) A chemical element is represented a symbol.

(8) We must include this chemical element in the group.

(9) Summarize the chemical element of momordica charantia.

(10) Hydrogen is the lighted chemical element of all.

(11) Xenon Chemical element, chemical symbol Xe, atomic number 54.

(12) Radon: Chemical element, chemical symbol Rn, atomic number 86.

(13) Cerium :Chemical element, a rare earth metal of the lanthanide series (hence having many properties of the transition elements), chemical symbol Ce, atomic number 58.

(14) Each chemical element has been given a name and a distinctive symbol.

(15) Nickel Metallic chemical element, one of the transition elements, chemical symbol Ni, atomic number 28.

(16) Bromine Nonmetallic chemical element, chemical symbol Br, atomic number 35.

(17) Strontium Chemical element, one of the alkaline earth metals, chemical symbol Sr, atomic number 38.

(18) Iron: Metallic chemical element, one of the transition elements, chemical symbol Fe, atomic number 26.

(19) Hydrogen: Lightest chemical element, chemical symbol H, atomic number 1.

(20) Nitrogen: Gaseous chemical element, chemical symbol N, atomic number 7.

(21) Chemical element is the general term for the same type of atoms with the same mass number.

(22) Chromium: Metallic chemical element, one of the transition elements, chemical symbol Cr, atomic number 24.

(23) Answer this or that pile of questions and you can find out which "Lost" character/chess piece/chemical element you are.

(24) Tungsten ( or wolfram ) : Metallic chemical element, of the transition elements, chemical symbol W, atomic number 74.

(25) Iridium: Metallic chemical element, one of the transition elements, chemical symbol Ir, atomic number 77.

(26) Sulfur: Nonmetallic chemical element, chemical symbol S, atomic number 16.

(27) Selenium: Semimetallic chemical element, chemical symbol Se, atomic number 34.

(28) Boron: Semimetallic chemical element, chemical symbol B, atomic number 5.

(29) Among the discoveries of the late nineteenth century were several new chemical elements, including radium.

(30) Cobalt is a form esse that a kind of essential little chemical element inside the human body, all to match with in living creature thing.

(31) Ion beam can be defined as the radiation which was the product of accelerated ions of chemical element by high-energy ion accelerator.

(32) What Robert Boyle (1627-1691) gave in his Sceptical Chymist (1661) is not, as is commonly said, a modern definition of a chemical element, but a traditional definition of a chemical element.

(33) Constituting of earth crust can from the chemical element, mineral, rock three aspects to explain.

(34) Beryllium : Chemical element , lightest of the alkaline earth metals, chemical symbol Be, atomic number 4.

(35) Silver: Metallic chemical element, one of the transition elements, chemical symbol Ag, atomic number 47.

(36) Lead: Metallic chemical element, chemical symbol PB, atomic number 82. Lead is a soft, silvery white or grayish, malleable, ductile, dense metal that conducts electricity poorly.

(37) Mercury ( quicksilver ): Metallic chemical element, chemical symbol Hg,(http:///chemical element.html) atomic number 80.

(38) Potassium: Chemical element , one of the alkali metals, chemical symbol K, atomic number 19.

(39) Iodine: Nonmetallic chemical element, chemical symbol I, atomic number 53.

(40) Lead: Metallic chemical element, chemical symbol PB, atomic number 82.

(41) Newton was a serious alchemist, who spent night upon dawn for three decades of his life slaving over a stygian furnace in search of the power to transmute one chemical element into another.

(42) Phosphorus Nonmetallic chemical element, chemical symbol P, atomic number 15.

(43) Zirconium: Metallic chemical element, one of the transition elements, chemical symbol Zr, atomic number 40.