Explain reason and also write chemical reactions. It is a highly corrosive liquid. Answer: Ex. And if the attractive force is less, then the electron pair will not remain closer towards the atom. The rust is hydrated iron (III) oxide, Fe2O3x.H2O. Give two examples each of the metals that are good conductors and poor conductors of heat respectively. So when zinc layer on the surface of galvanised iron article is broken, then zinc continues to corrode but iron article does not corrode or rust. Atomic size has an arrow towards bottom left (↙). (Metals are electron donors or they loses electrons). Answer: Explain any one reducing property of So, by giving chemical equation. This metal oxide (HgO) gets reduced to mercury metal (Hg) on further heating. You can also remember the non metallic character from the equation below. Question 34. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion. An element A burns with golden flame in air. And more number of protons means more amount of positive charge. Iodine. Now as the atomic size increases, the attractive force between the electron and nucleus decreases. That is why metals displace hydrogen from dilute acids. Question 35. So, their oxides are more stable. If the size of the atom is less, then it will exert more attractive force on the electron pair. What is 24-carat gold ? The bond formed by the transfer of electrons is called ionic bond. After few days the iron pot was found to have a number of holes in it. is moderately reactive. (i) Malleable: A substance or material which can be beaten into thin sheets is called malleable. Answer: In other words, ionization energy is inversely proportional to the atomic size. (iii) NaCl is not a conductor of electricity in solid state whereas it does conduct electricity in aqueous solution as well as in molten state. Answer: (ii) Ductile: A substance capable of being drawn into thin wires is called ductile. Answer: It has a tendency to gain one electron to complete its octet. In simple words, the electron itself cannot escape out of the orbit. And bigger the size, lesser will be the ionization energy. (iii) Copper wires are good conductor of electricity, so, they are used in electrical connections. Why is it so ? Hence they go together well. There is a girl named Neea. Calcination : It is the process in which carbonate ores of the metals are decomposed into oxides by heating them in the absence or limited air. It has 2 electrons in first orbit and other 6 electrons in second orbit. Notice that the reaction has to balance — the total number of atoms of hydrogen and oxygen on one side of the reaction are the same as the … Main Ores of Copper Just as the weather changes during the entire year, the properties of elements also change along the groups and periods in the Periodic table. Which of these two is used for sulphide ores and why? So, prior to reduction, metal carbonate and sulphides must be converted into metal oxides. On the other hand, if a copper plate is placed in a solution of silver nitrate, copper will slowly displace silver from the solution and blue solution of copper nitrate is formed. Name one metal and one metal that exist in liquid state at room temperature. 2Na + Cl2 → 2NaCl Answer: Since ore A gives CO2 and ore B gives SO2. Incorrect. Answer: It reacts with oxygen to form Slack coloured compound, CuO. For example, sodium is obtained by the electrolysis of molten sodium chloride (NaCl). H+ + e– → H If we haveprotondonorsandprotonac-ceptors,whichterminologyappliedto acidsandbases Write the equation of the reaction involved. Gallium, Magnesium, Caesium, Aluminium Answer: Question 8. If the attractive force is more, then the electron pair tends to remain closer towards the atom. Question 9. Best metals lies in the left bottom corner while best non metals lies in the top right corner of the periodic table (except group 18 elements. Left to right: property of elements increases. The molten iron runs down between the tracks and welds them together. Now further, I have explained all the Periodic trends with images and I have also given you a simple trick to remember each trends in Periodic table. This means that nonmetals display low (insulators) to moderate (semiconductors) bulk electrical conductivities, which increase with increasing temperature, and are subject to dielectric breakdown at high voltages and temperatures. This oxide layer can be dyed easily to give aluminium articles an attractive finish. So Z is H2. | Definition, Units, Types – Thermometry and Calorimetry, 10 Lines about Myself for Students and Children in English, MCQ Questions with Answers for Class 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, and 1 all Subjects, MCQ Questions for Class 10 Social Science SST with Answers PDF Download Chapter Wise, MCQ Questions for Class 9 Science with Answers PDF Download Chapter Wise, MCQ Questions for Class 11 Economics with Answers Chapter Wise PDF Download, MCQ Questions for Class 11 Accountancy with Answers PDF Download Chapter Wise, MCQ Questions for Class 12 Economics with Answers Chapter Wise PDF Download, MCQ Questions for Class 11 Biology with Answers Chapter Wise PDF Download, MCQ Questions for Class 11 Chemistry with Answers Chapter Wise PDF Download, MCQ Questions for Class 11 Physics with Answers Chapter Wise PDF Download. Group, the attractive force on the other hand, non-metal is ionic. 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