Description : What are the chemical properties of metals & non-metals?
Last Answer : metals electropositive, basicity, hard, ductile, malleable, sonorous nonmetals electronegative, acidic, brittle, and not all the other three properties.
Description : Chemical properties of Non-Metals
Last Answer : Chemical properties of Non-Metals: 1. Non-Metals form electronegative ions in a reaction. 2. Non-Metals react with water to form acidic oxides. 3. Non-Metals react with non-metals to form ionic ... reacts with acids to form salt and Hydrogen. 5. Metals are oxidizing agents as they accept electrons.
Description : How do you Compare the properties or metals and no metals?
Last Answer : Need answer
Description : Metals, in general are of low strength and do not possess required physio-chemical and technological properties for a definite purpose. Alloys are therefore more than metals alone. Discuss the arrangement of atoms and Structures of alloys.
Last Answer : Alloys are produced by melting or sintering two ore more metals, or metals and a non-metal, together. Alloys possess typical properties inherent in the metallic state. The chemical elements ... an alloy are its individual portions, each having a single structure with its characteristic features.
Description : Chemical properties of Metals
Last Answer : Chemical properties of Metals: 1. Metals form electropositive ions in a reaction. 2. Metals react with air to form basic oxides. 3. Metals react with water to evolve hydrogen. 4. Metals reacts with acids to form salt and Hydrogen. 5. Metals are reducing agents as they donate electrons.
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 : What chemical/physical properties help compare fuels in combustion engines? and how to apply them.
Last Answer : The ratings for fuel energy, flame propagation, combustion speed are based on comparison with octane in gasoline and pentane or cetane (depending on the applicatton) for diesel or jet fuel.. ... are many textbooks on petroleum technology, the Wiki article and references give a good starting point.
Description : The atomic masses of three elements X, Y and Z having similar chemical properties are 7, 23 and 39 respectively. a) Calculate the average atomic mass of elements X and Z. b) How is the ... this example? d) Give another example of a set of elements which are classified according to this law.
Last Answer : a) The average atomic mass of X and Z = 7 39 2 46 2 23 b) The average atomic mass of X and Z is equal to the atomic mass of Y c) The law illustrated in this example is Dobereiner’s law of triads. d) Another example of Dobereiner’s law is Calcium, Strontium and Barium.
Description : Elements that show the properties of both metals and non-metals are called (a) Allotropes (b) Metalloids (c) Alloys (d) Colloids
Last Answer : Ans:(b)
Description : What are transition elements? (1) Elements whose two outermost shells are incomplete (2) Elements which possess properties of both, metals and non-metals (3) They have eight electrons in the outermost shell (4) Elements whose three outermost shells are incomplete
Last Answer : (1) Elements whose two outermost shells are incomplete
Description : Which of the following properties is generally found, in non-metals?' (1) Brittleness (2) Conductivity (3) Ductility (4) Malleability
Last Answer : (1) Brittleness Explanation: An important physical property of non metals is that they are brittle and hence cannot be beaten into sheets or drawn into wires. In other words, non-metals are non-malleable and non-ductile. Where stress is applied on nonmetals, they shatter into pieces.
Description : Which of the following are properties is generally found in non-metals
Last Answer : Brittleness
Description : Elements showing properties of both met- als and non-metals are?
Last Answer : Metalloids
Description : Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the __________ stress. (A) Ultimate (B) Yield point (C) Proof (D) None of these
Last Answer : (C) Proof
Description : Give reason: Even though silicon is a non-metal it resembles metals in its properties.
Last Answer : When red hot silicon reacts with steam, it liberates hydrogen. Even when metals like hot iron, zinc or magnesium react with steam, they liberate hydrogen with their respective metal oxides. Hence silicon resembles metals in some properties.
Description : Elements which are not distinctively metals and possess some physical properties of non- metals are called
Last Answer : metalloids.
Description : Physical properties of Non-Metals
Last Answer : Physical properties of Non-Metals: 1.Non-Metals are non-lustrous except Iodine. 2.Non-Metals are not ductile nor malleable. 3.Non-Metals are bad conductor of heat & electricity. 4.Non-Metals either ... Metals are generally brittle. 6.Non-metals are not strong. 7.Non-Metals have low tensile strength.
Description : Metalloids (A) Are good conductor of heat & electricity (B) Act as electron donors with metals & as electron acceptor with non metals (C) Are not necessarily solids at room temperature ... & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron
Last Answer : D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron
Description : How does the of Hydration Enthalpy of alkaline earth metals vary & compare it with alkali metals
Last Answer : Ans The hydration enthalpies of alkaline earth metal ions decrease with increase in ionic size down the group. Be2+> Mg2+ > Ca2+ > Sr2+ > Ba2+ The hydration enthalpies of alkaline earth metal ions ... MgCl2 and CaCl2 exist as MgCl2.6H2O and CaCl2· 6H2O while NaCl and KCl do not form such hydrates.
Last Answer : The hydration enthalpies of alkaline earth metal ions decrease with increase in ionic size down the group. Be2+> Mg2+ > Ca2+ > Sr2+ > Ba2+ The hydration enthalpies of alkaline earth metal ... and CaCl2 exist as MgCl2.6H2O and CaCl2· 6H2O while NaCl and KCl do not form such hydrates.
Description : What are examples of the electronic properties of metals?
Last Answer : This can be an element, compound, or alloy. (Mix of two metals to get new properties). Examples are a good conductor of electricity, high density, and ductility. Most elements are metals above certain measures.
Description : Refining process of impure metals depends upon the differences in properties of the metal. Extraction of Al is usually carried out from its bauxite or
Last Answer : Refining process of impure metals depends upon the differences in properties of the metal. ... . leaching C. liquation D. magnetic seperation
Last Answer : Refining process of impure metals depends upon the differences in properties of the metal. Extraction of Al is usually ... A D. I-D,II-A,III-C,IV-B
Description : What is a type of element who's physical properties are generally apposite of that of metals?
Description : What are the properties that make metals suitable for coins?
Last Answer : Almost any metal is suitable for coins. But from a practicalpoint of view, metals should be fairly hard, so that the imprintdoesn't fade too quickly and it shouldn't be too light since mostpeople like their coins to have a little 'weight', certainly if acoin represents a certain value.
Description : Which of the following statements about the physical properties of metal is not correct? (a) All metals are solid except mercury (b) Most metals are hard except sodium and potassium (c) Metals are not malleable (d) Most metals are ductile
Last Answer : Ans:(c)
Description : Babbitt metals used for making bearings are (A) Tin or lead based alloys (B) Short of antifrictional properties (C) Having homogenous microstructure (D) Yellow metals
Last Answer : (A) Tin or lead based alloys
Description : How are the properties of alloys different from those of metals?
Last Answer : Copper is reddish and zinc is grayish in colour where as brass which is an alloy of copper and zinc is golden yellow in colour. Iron is a magnetic substance but stainless steel, an alloy of iron is non magnetic.
Description : Beryllium, the first member of the Group 2 metals, shows different behaviour as compared to magnesium and rest of the members what is this properties
Last Answer : Ans Anomalous Behaviour
Description : Physical properties of Metals
Last Answer : Physical properties of Metals: 1. Metals have lustre. 2. Metals are malleable and ductile. 3. Metals are Good conductors of heat & Electricity. 4. Metals are solids at Room temperature except Mercury ... strong. 7. Metals have high tensile strengths. 8. Metals have high melting and boiling points.
Description : Which one of the following best defines the word allotropes ? A Different structural forms of an element B A pair of substances that differ by H+ C Elements that possess properties intermediate between ... a specific number of neutrons E The different phases (solid, liquid or gas) of a substance
Last Answer : A Different structural forms of an element
Description : What are non-examples of chemical properties?
Last Answer : chemical properties are to do with how it acts chemically-so:polar vs Non polarPH / Pkamelting point / boiling pointTherefore non-examples would be its molecular mass/ geometry /atomical structure... although some of these would surelycontribute to its chemical properties.
Description : Compare the properties of two isomeric products x and y formed in the following reaction.
Last Answer : Compare the properties of two isomeric products x and y formed in the following reaction. A. `{:("Acid Strength",H_(2 ... y,y gt x,x gt y,y gt x,):}`
Description : How do the physical properties of diamond compare to the physical properties of graphite?
Description : Compare the properties of amorphous and crystalline silicon
Last Answer : morphous silicon It is a brown powder It does not conduct electricity at low temperatures. It is more reactive than crystalline silicon When heated in air, it oxidizes at the surface level ... electricity It is less reactive than amorphous silicon It does not burn in air even when heated
Description : Basic metals can be converted into gold by ? A. Heating B. Beating C. Artificial nuclear radioactivity (Answer) D. Chemical reaction
Last Answer : C. Artificial nuclear radioactivity (Answer)
Description : Low purity oxygen is used for (A) L.D. steel making (B) Cutting and welding of metals (C) Medicinal purposes (D) Chemical oxidation processes
Last Answer : (D) Chemical oxidation processes
Description : Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode (A) Occurs higher in the electro-chemical series of metals (B) Is exemplified by magnesium plate (C) ... cathodic base material to be guarded against corrosion (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : What types of metals are typically removed via chemical precipitation?
Last Answer : Some of the more common metals or other substances removed via precipitation include: 1) Aluminum 2) Arsenic 3) Barium 4) Cadmium 5) Calcium 6) Trivalent chromium 7) Hexavelent chromium 8) Copper 9) Iron 10) Lead 11) Magnesium 12) Manganese 13) Mercury 14) Nickel 15) Selenium 16) Zinc
Description : The catalytic activity of transition metals and their compounds is ascribed mainly to (1) their chemical reactivity (2) their magnetic behaviour (3) their unfilled d-orbitals (4) their ability to adopt variable oxidation states
Last Answer : (4) their ability to adopt variable oxidation states
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 : Is there a chart out there that lists the chemical properties of common plants?
Last Answer : http://tinyurl.com/29ys5hb
Description : Classify minerals into two groups on the basis of chemical and physical properties and give one example of minerals of each group. -Geography
Last Answer : Minerals are classified on the basis of their physical properties and chemical properties such as: Metallic Minerals Metallic minerals are those that are rich in metals and a source to procure a variety of ... is rich in building stones i.e. sandstone, granite, marble, fuller's earth, and gypsum
Description : what All substances have characteristic properties. If one of these properties can be observed without changing the identity of the substance, it must be A. universal property. B. physical property. C. biological property. D. chemical property.?
Last Answer : B: Physical Property
Description : What are the properties of chemical change ?
Last Answer : Characteristics of chemical change are as follows: One or more new objects are created. The physical and chemical properties of objects change. A completely new molecule is formed by changing the ... cannot be easily restored to its former state. Absorption or emission of heat energy must occur.
Description : Why the elements belonging to the same group do have similar chemical properties ?
Last Answer : Why the elements belonging to the same group do have similar chemical properties?
Description : What element has similar chemical properties to phosphorus?
Description : What is a chemical properties of a chair?