Description : Which is not a type of elements? (1) Metals (2) Non Metals (3) Metalloids (4) Gases
Last Answer : (3) Metalloids Explanation: Element is a chemical substance consisting of atoms having the same number of protons in their atomic nuclei. There are 118 elements that have been identified. The elements classified as metalloids are boron, silicon, germanium, arsenic, antimony, tellurium and polonium.
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 : 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 : Define Metals , Non Metals & Metalloids.
Last Answer : Metals : 1. They are electropositive elements. 2. Their oxides are basic. 3. They tend to lose electrons & form positive ions. 4. They are lustrous , malleable & ductile except Hg which is the ... acidic ) in nature. 3. They are concentrated between the metals & the nonmetals in the periodic table.
Description : Metals, Metalloids and Non-metals
Last Answer : The elements in the periodic table can also be divided according to whether they are metals, metalloids or non-metals. The zigzag line separates all the elements that are metals from those that ... more metals then non-metals. Metals, metalloids and non-metals all have their own specific properties.
Description : How many of the following mimerals are oxides of metals// metalloids .
Last Answer : How many of the following mimerals are oxides of metals// metalloids .
Description : What is the % of H2O in Fe(CNS)3⋅3H2O [CPMT 1981] (A) 45 (B) 30 (C) 19 (D) 25
Last Answer : (C) 19
Description : The percentage of P2O5 in diammonium hydrogen phosphate (NH4)2HPO4 is [CPMT 1992] (A) 23.48 (B) 46.96 (C) 53.78 (D) 71.00
Last Answer : (C) 53.78
Description : The percentage of oxygen in NaOH is [CPMT 1979] (A) 40 (B) 60 (C) 8 (D) 10
Last Answer : (A) 40
Description : 74.5 g of a metallic chloride contains 35.5 g of chlorine. The equivalent weight of the metal is [CPMT 1986] (A) 19.5 (B) 35.5 (C) 39.0 (D) 78.0
Last Answer : (C) 39.0
Description : Which of the following pairs of substances illustrate the law of multiple proportions? [CPMT 1972, 78] (A) CO and CO2 (B) H2O and D2O (C) NaCl and NaBr (D) MgO and Mg(OH)2
Last Answer : (A) CO and CO2
Description : The lanthanide series elements are also known as: w) rare earth elements x) non-metals y) fifth period elements z) sixth period elements
Last Answer : ANSWER: W -- RARE EARTH ELEMENTS
Description : What elements were known by 1985?
Last Answer : Approx. 107 elements.
Description : Name all metalloids.
Last Answer : Ans: Si, Ge, As, Sb, Te, Po, At
Description : What do you mean by Metalloids? In which block metalloids are found?
Last Answer : Ans: elements showing some properties of metals and non metals both are called mettaloids .it are found in P block elements in BW 13 and 18 groups.
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 : How many elements were found in the year 1985?
Last Answer : Any element was discovered in 1985.
Description : Explain the following : (i) Low spin octahedral complexes of nickel are not known. (ii) The π-complexes are known for transition elements only. (iii) CO is a stronger ligand than NTL, for many metals. -Chemistry
Last Answer : (i) The electronic configuration of Ni is [Ar] 3d8 4s2 which shows that it can only form two types of complexes i.e. square planar (dsp2) in presence of strong ligand and tetrahedral (sp3) in ... more splitting of d-orbitals and moreover it is also able to form π bond due to back bonding.
Description : What are metalloids? Explain by giving examples. -Chemistry-10
Last Answer : Metalloids are elements which show some properties of metals and some properties of non-metals. Examples: Silicon, boron, arsenic, antimony, germanium, tellurium, polonium.
Description : 6.What are metalloids? -Science
Last Answer : v Metalloids can be defined as chemical elements whose physical and chemical properties fall in between the metal and the non metal categories. Boron, germanium, silicon ... following elements are also known to be classified as metalloids in some circumstances:CarbonAluminiumSeleniumPoloniumAstatin
Description : What are metalloids? Give example.
Last Answer : Elements which are not distinctively metals and possess some physical properties of non- metals are called metalloids.
Description : What is Metalloids ?
Last Answer : Metalloids: Metalloids are the elements which possess both the properties of metal as well as non-metals. E.g. Silicon, Germanium, Antimony, etc.
Description : Metalloids
Last Answer : Metalloids or semi-metals have mostly non-metallic properties. One of their distinguishing characteristics is that their conductivity increases as their temperature increases. This is the opposite of what ... as computers. The metalloids include elements such as silicon (Si) and germanium (Ge).
Description : Hot conc. `H_(2)SO_(4)` acts as moderately strong oxidising agent. It oxidises both metals and non-metals. Which of the following elements is oxidised
Last Answer : Hot conc. `H_(2)SO_(4)` acts as moderately strong oxidising agent. It oxidises both metals and non-metals. Which ... products ? A. Cu B. S C. C D. Zn
Description : Who Classified Elements as Metals and non-metals?
Last Answer : Lavoisier
Description : Elements showing properties of both met- als and non-metals are?
Last Answer : Metalloids
Description : Elements which are not distinctively metals and possess some physical properties of non- metals are called
Last Answer : metalloids.
Description : List the elements of 15 th group of the periodic table. Name the distinct metals and non-metals of the group.
Last Answer : Nitrogen and phosphorous are non-metals. Arsenic and Antimony are metalloids, Bismuth is a metal.
Description : What is the name of those elements which divide metals and non-metals in the periodic table?
Description : Give reason: Classification of elements as metals and non-metals is justified but not satisfactory.
Last Answer : Classification of elements as metals and non-metals is justified because there are more common characteristics in both the groups but it is not satisfactory because each metal or non-metal have completely different properties.
Description : Which one of the following statements concerning elements in the Periodic Table is correct? A Elements of the same group all have the same number of electrons in the outermost occupied electron shell. B ... (Group 17) are all gases at room temperature. E The Group 13 elements are all metals.
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 : Why do transition metals have higher I.E than s –block elements ?
Last Answer : Ans: It is due to smaller atomic size than s-block elements , effective nuclear charge is more , terefore I.E is high.
Description : Why II group elements are called alkaline earth metals ?
Last Answer : These are called so because their oxides and hydroxides are alkaline in nature and these metal oxides are found in the earth’s crust.
Description : Why I group elements are called alkali metals ?
Last Answer : These are called so because they form hydroxides on reaction with water which are strongly alkaline in nature.
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 : 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 : The elements which are known as soft metals?
Last Answer : Pottassium & Sodium
Description : Sulphur forms the chlorides S2Cl2 and SCl2. The equivalent mass of sulphur in SCl2 is [EAMCET 1985] (A) 8 g/mole (B) 16 g/mole (C) 64.8 g/mole (D) 32 g/mole
Last Answer : (D) 32 g/mole
Description : Different proportions of oxygen in the various oxides of nitrogen proves the [MP PMT 1985] (A) Equivalent proportion (B) Multiple proportion (C) Constant proportion (D) Conservation of matter
Last Answer : (B) Multiple proportion
Description : Are non-metals and gases the same ?
Last Answer : Answer:, Non-metals and gas are not one. Non-metals can also be solid or liquid. Such as: - Sulfur (solid in some cases) , Bromine (liquid). However, although all gases are non-metallic, not all non-metals are gases.
Description : what do you understand by “Non stoichiometric hydrides”? Do you think this type of hydrides to be formed by alkali metals? Justify your answer.
Last Answer : Ans: Hydrides which are deficient in hydrogen and in which the ratio of hydrogen to metal is fractional are called non-stoichiometric hydrides. This type of hydrides are formed by d-and ... they form only stoichiometric hydrides. In other words alkali metals do not form non-stoichiometric hydrides.
Description : Which elements are called clay metals ?
Last Answer : : The elements in group 2 of the periodic table are called base metals.
Description : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ionic in nature and hydrogen bonding is more important f
Last Answer : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ionic in nature ... H_(2)O lt H_(2)Te -` boiling point
Last Answer : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ... oxides are usually covalent and acidic in nature
Description : Which of the following elements react with metals to form their binary compounds exhibiting `-3` oxidation state ?
Last Answer : Which of the following elements react with metals to form their binary compounds exhibiting `-3` oxidation state ? A. N B. P C. As D. Bi
Description : Which group of elements is called alkaline earth metals ?
Last Answer : 1st A group because the oxides and hydrides are alkaline in nature Among 1A group elements why the element lithium is the most powerful, reducing agent in equivalent state Due to its low sublimation and hydration energy