Description : The elements in group 1A of the periodic table are called: w) halogens x) alkaline earths y) alkali metals z) rare earths
Last Answer : ANSWER: Y -- ALKALI METALS
Description : Name the chemical element that is eleventh in the Lanthanide Series in the periodic table. Because of the metal's high thermal-neutron-absorption cross section, it has been of much interest in terms of use in nuclear reactor hardware. The chemical symbol for this element is Er.
Last Answer : ANSWER: ERBIUM
Description : The elements that have an outer electron configuration ns2 (read: n - s - 2) are called: w) halogens x) transition metals y) alkaline earths z) noble gases
Last Answer : ANSWER: Y -- ALKALINE EARTHS
Description : Name this chemical element. It is a member of the Lanthanide Series and can be found in the minerals apatite (pron: AP-a-tite), gadolinite (pron: gad-O-lin-ite), and xenotime (pron: ZEN-o- time). This element was first identified by Boisbaudran in 1886. Its chemical symbol is Dy.
Last Answer : ANSWER: DYSPROSIUM (pron: dis-PRO-zee-um)
Description : Which of the 3rd period elements loses electrons most readily? w) Sodium x) Magnesium y) Aluminum z) Silicon
Last Answer : ANSWER: A-SODIUM
Description : In the periodic table, which of the following identifies a horizontal row? w) period x) group y) family z) series
Last Answer : ANSWER: W -- PERIOD
Description : What is the number of elements in a lanthanide row ?
Last Answer : The number of elements in a lanthanide row is 15 .
Description : Which of the following elements is not an alkaline earth metal? w) beryllium x) barium y) calcium z) rubidium
Last Answer : ANSWER: Z -- RUBIDIUM
Description : Elements that exist in two or more distinctly different solid forms are known as: w) azeotropes x) allotropes y) isotopes z) isochores
Last Answer : ANSWER: X -- ALLOTROPES
Description : Which of the following metals is least subject to oxidation? w) silver x) gold y) magnesium z) nickel
Last Answer : ANSWER: X -- GOLD
Description : Which of the following metals can be obtained from its ore only by electrolysis of a molten salt ? w) cobalt x) chromium y) copper z) sodium
Last Answer : ANSWER: Z -- SODIUM
Description : Which oxide of the following metals is often used as a pigment in white paint? w) titanium x) cobalt y) nickel z) vanadium
Last Answer : ANSWER: W -- TITANIUM
Description : The silver luster of the metals can be attributed to one of the following. It is attributed to their free w) protons x) ions y) neutrons z) electrons
Last Answer : ANSWER: Z -- ELECTRONS
Description : Which one of the following metals is essential to the structure and functioning of hemoglobin? w) copper x) magnesium y) tin z) iron
Last Answer : ANSWER: Z -- IRON
Description : Which one of the following metals is immune to corrosion by air, water, hydrochloric acid and nitric acid; but is soluble in aqua regia? w) gold x) silver y) magnesium z) nickel
Last Answer : ANSWER: W -- GOLD
Description : Which of the following metals is obtained from its most common ore using an electrolytic process? w) nickel x) tin y) aluminum z) manganese
Last Answer : ANSWER: Y -- ALUMINUM
Description : Which of the following metals is LEAST reactive toward atmospheric oxygen? w) Lead x) Copper y) Iron z) Aluminum
Last Answer : ANSWER: X -- COPPER
Description : Which of the following metals is a solid at room temperature, yet melts in your hand? w) gallium x) cesium y) sodium z) magnesium
Last Answer : ANSWER: W -- GALLIUM
Description : Which of the following metals melts in your hand? w) gallium x) cesium y) sodium z) magnesium
Description : This noncombustible liquid in its dry form is noncorrosive to common metals except aluminum. About 90% of all of this material which is manufactured goes into the production of chlorofluorocarbons. ... substance: w) carbon tetrachloride x) methylene chloride y) hydrogen chloride z) methyl fluoride
Last Answer : ANSWER: W -- CARBON TETRACHLORIDE
Description : Cinnabar, pyrite and galena are minerals which consist of one or more metals combined with the same element. Which one of the following is the element that is common to all three of these minerals? Is it: w) iron x) copper y) sulfur z) sodium
Last Answer : ANSWER: C-- SULFUR
Description : Refractory metals are known for which of the following properties: w) lack of chemical reactivity x) low density y) high melting point z) high thermal conductivity
Last Answer : ANSWER: Y -- HIGH MELTING POINT
Description : In which country was a method for making rust-resistant iron discovered in the fifth century B.C.? w) Sumeria x) Egypt y) India z) Babylon
Last Answer : ANSWER: Y -- INDIA
Description : Mineral acids are also classified as: w) carboxyl acids x) inorganic acids y) non-electrolytic acids z) oxidation acids
Last Answer : ANSWER: X -- INORGANIC ACIDS
Description : What is the element number of lanthanide square ?
Last Answer : Lanthanide square has 15 basic elements.
Description : Which of the following is the oldest period of tim lasting from the beginnings of the earth to approximately 570 million year ago? w) Precambrian x) Pleistocene (pron: ply-sto-sin) y) Miocene (pron: my-o-sin) z) Jurassic
Last Answer : ANSWER: W -- PRECAMBRIAN
Description : Recent discoveries of ancient cratering near the Yucatan Peninsula support the theory that a meteor or cometary impact may have resulted in mass extinctions of species on Earth about 65 million years ago. ... is that impact thought to have occurred? w) Permian x) Triassic y) Jurassic z) Cretaceous
Last Answer : ANSWER: Z -- CRETACEOUS
Description : Most of the transuranic elements were first created: w) in Germany x) at Argonne National Laboratory y) in California z) in Russia
Last Answer : ANSWER: Y -- IN CALIFORNIA
Description : Which of the following elements does not occur in nature as a native ore? w) silver x) gold y) platinum z) aluminum
Last Answer : ANSWER: Z -- ALUMINUM
Description : Which of the following elements does not normally occur as a diatomic molecule? w) hydrogen x) chlorine y) argon z) oxygen
Last Answer : ANSWER: Y -- ARGON
Description : Radon differs from other naturally radioactive elements in which one of the following ways. Is it because radon w) is extremely radioactive x) decays into the element radium y) is a noble gas z) is as chemically active as fluorine
Last Answer : ANSWER: Y -- IS A NOBLE GAS
Description : Of the nonmetallic elements the one least likely to be found in organic compounds is: w) nitrogen x) phosphorus y) chlorine z) selenium
Last Answer : ANSWER: Z -- SELENIUM
Description : What are the major constituents of typical fly ash particles generated from the combustion of coal? w) acidic and basic oxides x) trace elements y) unburned carbon z) sulfates and phosphates
Last Answer : ANSWER: W -- ACIDIC AND BASIC OXIDES
Description : Which of the following groups of elements have an OUTER ELECTRONIC configuration of S-2-P-2? w) halogens x) Nitrogen-Phosphorus Group y) Carbon-Silicon Group z) Boron-Aluminum Group
Last Answer : ANSWER: Y -- CARBON-SILICON GROUP
Description : Which of the following elements would most likely be a silvery solid at room temperature? w) Sodium x) Silicon y) Selenium z) Astatine
Last Answer : ANSWER: W -- SODIUM
Description : Which of the following elements has the highest first ionization energy? w) Helium x) Neon y) Fluorine z) Argon
Last Answer : ANSWER: W -- HELIUM
Description : Which of the following elements would form a covalent bond with Bromine? w) Calcium x) Aluminum y) Oxygen z) Tin
Last Answer : ANSWER: Y -- OXYGEN
Description : Which of the following elements has the largest crystallographic radius? w) Mg x) N y) K z) F
Last Answer : ANSWER: Y -- K
Description : Which one of the following elements is not found in nature? w) Technetium x) Iridium y) Osmium z) Molybdenum
Last Answer : ANSWER: W -- TECHNETIUM
Description : The molar volume of which two elements is the same at standard temperature and pressure? w) fluorine and bromine x) fluorine and iodine y) fluorine and chlorine z) bromine and iodine
Last Answer : ANSWER: Y -- FLUORINE AND CHLORINE
Description : Which of the following elements gains electrons most readily? w) Sodium x) Magnesium y) Aluminum z) Fluorine
Last Answer : ANSWER: D -- FLUORINE
Description : Which of the following elements has the highest electronegativity? w) Lithium x) Iodine y) Cesium z) Oxygen
Last Answer : ANSWER: D -- OXYGEN
Description : Which of the following chemists was the first to use letters as symbols for elements? w) Ernest Oliver Lawrence x) Louis Andrew Proust y) Jons Jacob Berzelius z) none of these
Last Answer : ANSWER: Y -- JONS JACOB BERZELIUS
Description : Teflon is produced by polymerizing ethylene which hydrogen substituted with one of the following elements: w) teflinium x) tin y) fluorine z) carbon
Last Answer : ANSWER: Y -- FLUORINE
Description : Of the following elements which has the largest atomic radius? w) Ba x) F y) C z) Be
Last Answer : ANSWER: W -- Ba
Description : Which of the following elements forms a tetrahedra structure? w) carbon x) beryllium y) boron z) fluorine
Last Answer : ANSWER: W -- CARBON
Description : Which of the following elements can form the great number of covalent bonds? w) carbon x) nitrogen y) oxygen z) sulfur
Last Answer : ANSWER: Z -- SULFUR
Description : Which of the following elements would form an acid oxide with the formula XO2 and an acidic compound with hydrogen with the formula XH2? w) Sodium x) Magnesium y) Aluminum z) Sulfur
Description : Which of the following four elements has the largest atomic radius? Is it: w) strontium x) francium y) calcium z) bromine
Last Answer : ANSWER: X -- FRANCIUM
Description : Name the person who developed a table of elements which revealed regularities in elemental properties in 1869? w) Theodore Richards x) Antoine Lavoisier y) Dmitri Mendeleev z) Svante Arrhenius
Last Answer : ANSWER: Y -- DMITRI MENDELEEV