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Neon has 10 electrons, and xenon has 54 electrons. Noble gases tend to be relatively unreactive...
9. Explain why ionization energy decreases as you move down the noble gases from Helium to argon. 10. Sodium atoms are much larger than chlorine atoms, but sodium ions are much smaller than chloride ions. Why? 11. Compounds have been made from Xenon and Krypton, but not from other noble gases. Give a reason why you think this is true. 12. Based on energy changes involved in forming ions, why does Copper form both Cut and Cu2 ions but Sodium...
1. (0.5 pt) Why do you think there are no electronegativity values for the noble gases? 2. (0.5 pt) What are the three most electronegative atoms on the periodic table? 3. (1 pt) What type of bond (covalent or ionic) would you expect to form between an atom with a very high electronegativity and an atom of very low electronegativity (maximum difference in electronegativity between atoms)? Explain and give an example. 4. (1 pt) The Periodic table below shows the...
10. If you pour water in a glass cylinder, you see upper and lower meniscus. If you use a plastic cylinder, the surface appears flat. Which of the following properties of water is responsible for the formation of the meniscus? High heat of vaporization Cohesion and Adhesion Excellent solubility maintenance of pH 17. If you were to make 200 mL of 3% sugar solution, how much sugar would you have to weigh? 2 g 12 g 6 g 1.5 g...
Draw an energy-level diagram for the valence molecular orbitals of CO. Include the relevant atomic orbitals in your diagram. Clearly label each molecular orbital (e.gs2s, p2p, etc.) and fill in the appropriate number of electrons. Use the same energy order as the neutral O2 molecule.b) Is CO paramagnetic or diamagnetic? What is the bond order of CO? c) Draw a Lewis structure for CO. Does this match the predicted bond order? d) CO can react withOH– to form the formate...
A 13. (a) Which would have the stronger intermolecular force, CHA or Cla? Briefly explain your answer. V (b) CHa boils at 111 k while Cola boils at 350 K. Does this data support or contradict your answer to part (a)? Briefly explain eng point 14. Why does ethane (CH) have a higher boiling point (184 K) than methane (CH 111 K)? 163 Model III: Another set of boiling point data Substance Boiling point Boiling point HF Substance HO H...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...
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Name Lab Section _Date The Mole Concept and Atomic Weights The purpose of this activity is to better understand the concepts of relative atomic mass, counting by weighing and the mole. Percent composition and average atomic mass are included. Part I. Relative Atomic Masses and the Mole - Early Method When John Dalton proposed his atomic theory, he stated that the atoms of each element...
3.2 Periodic trends 1. (0620-5 2012-Paper 1/2-Q21) Which properties of the element titanium, Ti, can be predicted from its position in the Periodic Table? forms coloured compounds conducts electricity when solid can be used has low density as a catalyst X A X X Xx 2. (0620-W 2012-Paper 1/1-Q20) The diagram shows an outline of the Periodic Table. U V W X Y Which of the elements U, V, W, X and Y would react together in the ratio of...
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Grignard reagent THE GRIGNARD REAGENT-PREPARATION AND REACTION In this experiment, you will prepare a Grignard reagent, phenyl magnesium bromide, from bromobenzene and magnesium metal. The Grignard reagent will then react with methyl benzoate to form triphenylmethanol. Introduction Grignard reagents, such as organomagnesium halides, were discovered in 1910 by French chemist Victor Grignard. The Grignard reaction is one of the most general methods for carbon- carbon bond formation in all of organic chemistry....