Description : What is a soft metallic element?
Last Answer : leadsymbol Pb
Description : An unknown element is a soft metallic solid. It is highly reactive and has a low melting point. In which group of the periodic table is it most likely to be found?
Last Answer : Sodium - group 1
Description : A certain thickness of the coal, if stored unscientifically on soft (katcha) ground having no metallic/concrete flooring gets sunked into the ground, which is termed as the 'carpet loss'. The carpet loss may be of the order of __________ cms. (A) 1 to 2 (B) 3 to 4 (C) 5 to 15 (D) 20 to 40
Last Answer : (C) 5 to 15
Description : Sodium salt of higher molecular weight fatty acid is termed as the __________ soap. (A) Hard (B) Soft (C) Metallic (D) Lubricating
Last Answer : (B) Soft
Description : Transparent soaps (e.g. Pears) are (A) Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency (B) ... (C) Metallic soaps with frothing agent from which glycerine has not been recovered (D) None of these
Last Answer : (A) Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency
Description : Shaving soaps are (A) Soft potassium soaps (potassium salt of fatty acid) with free Stearic acid to give lather a lasting property (B) Metallic soaps compounded with frothing agents (C) High free alkali soaps having excess of cane sugar and alcohol (D) None of these
Last Answer : (A) Soft potassium soaps (potassium salt of fatty acid) with free Stearic acid to give lather a lasting property
Description : The elements of the third period of the Periodic Table are given below: periodic-classification-of-elements-chapter-wise-important-questions-class-10-science-1 (a) Which atom is bigger, Na or Mg? Why? (6) Identify the most (i) metallic and (ii) non-metallic element in Period 3. -Science
Last Answer : (a) Sodium is bigger than magnesium as it has lesser nuclear charge so there is less force of attraction between nucleus and valence electrons and less effective nuclear charge. It is, therefore, ... the most non-metallic element because it can gain electrons easily due to its smallest atomic size.
Description : 1The elements of the second period of the Periodic Table are given below: Li Be B C N O F (a) Give reason to explain why atomic radii decrease from Li to F. (b) Identify the most (i) metallic and (ii)non-metallic element. -Science
Last Answer : a) It is because nuclear charge increases due to increase in atomic number, therefore, force of attraction between nucleus and valence electrons increases, i.e. effective nuclear charge increases, hence ... element is ‘F’ because it can gain electrons easily due to smallest atomic size.
Description : Identify the group 14 element that best fits each of the following description. A. Non-metallic element B. Form the most acidic oxide
Last Answer : Identify the group 14 element that best fits each of the following description. A. Non-metallic ... oxidation state. D. Forms strong π bonds.
Description : Which metallic element has the property of catching fire if dropped in hot water?
Last Answer : Sodium
Description : (a). Which is largest in size- Cu+ , Cu+2, Cu and why? (b). which element in the periodic table has the highest ionization enthalpy? (c). Which element is more metallic in the periodic table.?
Last Answer : Ans. (a). Cu is largest due to less effective nuclear charge. It has 29 electrons, 29 protons, Cu+ has 28 electrons and 29 protons, Cu2+ has 27 electrons and 29 protons. (b). He has highest ionization enthalpy. (c). Mg is more metallic due to lower ionization energy
Description : On going down in a group in the periodic table, the metallic nature of element
Last Answer : increases.
Description : The first element of 14 th group is carbon, which is a non-metal. The metallic members of this group are
Last Answer : tin and lead
Description : Which metallic element is liquid at room temperature? A. Zinc B. Nickel C. Lead D. Mercury (Answer)
Last Answer : D. Mercury (Answer)
Description : The metallic element with the highest melting point is: w) Ta x) W y) Rh z) Mo
Last Answer : ANSWER: X -- W
Description : Metallic elements are often obtained from ores. Name the metallic element which is produced from the ore Bauxite.
Last Answer : ANSWER: ALUMINUM
Description : What element is soft metals?
Description : The soft silvery metalic element which ionizes easily when heated or exposed to light and is present in atomic clocks is – (1) Cerium (2) Cesium (3) Calcium (4) Californium
Last Answer : (2) Cesium Explanation: 1967, based on Einstein defining the speed of light as the most constant dimension in the universe, the International System of Units isolated two specific wave counts ... cesium has lowest ionization energy and hence it can show photoelectric effect to the maximum extent.
Description : A sulphate salt of group 2 element of the periodic table is white ,soft substance which can be moulded into different shapes by making its dough.Identify the salt . (a) CaSO4.1/2 H2O (b) CaSO4.2H2O (c) 2CaSO4. 1⁄2 H2O (d)CaSO4
Last Answer : (a) CaSO4.1/2 H2O
Description : The soft silvery metalic element which ionizes easily when heated or exposed to light and is present in atomic clocks is : (1) Cerium (2) Cesium (3) Calcium (4) Califonrium
Last Answer : Cesium