Molecule Polarity PhET Lab A study of electronegativity‚ bond polarity‚ and molecular polarity Introduction: In this atomic-level simulation‚ you will investigate how atoms’ electronegativity value affects the bonds they produce. When two atoms bond‚ a pair of electrons is shared between atoms. Electronegativity is a measure of a single atom’s ability to hoard electrons shared in that bond. In this lab you will work diligently‚ at your own pace‚ to answer a number of questions. To begin‚ from
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represent the electron level diagram. a . S b. c. d. none of the above ( ) Choose 2) Which of the following is fa lse about MO theory? a) no. of atomic orbital formed will be the sam e as the no. of molecular orbital form b) MO theory not only can be used to explain magnetic properties but as well as el ectrical conductivity c) MO diagram for carbon dioxide is the
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when exposed to sunlight E) the total reflection of light by metals giving them their typical luster 3. In the Bohr model of the atom‚ __________. A) electron paths are controlled by probability B) electrons travel in circular paths called orbitals C) electrons can have any energy D) electron energies are quantized E) both A and C 4. The de Broglie wavelength of a __________ will have the shortest wavelength when traveling at 30 cm/s. A) car B) planet C) hydrogen atom D) uranium
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Sunlight is shown coming in from the right. The earth‚ of course‚ is at the center of the diagram. The moon is shown at 8 key stages during its revolution around the earth. The moon phase name is shown alongside the image. The dotted line from the earth to the moon represents your line of sight when looking at the moon. The large moon image shows what you would see at that point in the cycle. For the waning gibbous‚ third quarter‚ and waning crescent phases you have to mentally turn yourself upside
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A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electromagnetic force attraction between opposite charges‚ either between electrons and nuclei‚ or as the result of a dipole attraction. The strength of chemical bonds varies considerably; there are "strong bonds" such as covalent or ionic bonds and "weak bonds" such as dipole-dipole interactions‚ the London dispersion force and hydrogen bonding
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will have four electron pairs around the central nitrogen atom and be tetrahedral with respect to electron pairs. Ammonia‚ NH3 has a lone pair which generates more repulsion than the 3 bonding pairs of electrons. The shape of NH3 is therefore distorted tetrahedral. 2.3b Known molecular shapes b recall and explain the shapes of BeCl2‚ BCl3‚ CH4‚ NH3‚ NH4+‚ H2O‚ CO2‚ gaseous PCl5 and SF6 and the simple organic molecules listed in Units 1 and 2 |molecule |shape wrt
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163 CHAPTER 13 HYDROCARBON Hydrocarbons are composed of Carbon and hydrogen. The important fuels like Petrol‚ kerosene‚ coal gas‚ CNG‚ LPG etc. are all hydrocarbons or their mixture. Sources: Petroleum and natural gas are the major sources of aliphatic hydrocarbon while coal is an important source of aromatic hydrocarbons. The oil trapped inside the rocks is known as petroleum. PETRA – ROCK‚ OLEUM – OIL. The oil in the petroleum field is covered with a gaseous mixture known as natural
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decreases (C) paramagnetic character increases (D) paramagnetic character decreases and the bond order increases Answer: (D) 4. Which one of the following conversions involve change in both hybridization and shape? [Karnataka CET 2010] (A) NH3 → NH4+ (B) CH4 → C2H6 (C) H2O → H3O+ (D) BF3 → BF4– Answer: (D) 5. Assuming that Hund’s rule is violated‚ the bond order and magnetic nature of the diatomic molecule B2 is [IIT JEE 2010] (A) 1 and diamagnetic (B) 0 and diamagnetic (C) 1 and
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calcium compounds including Portland cement; the biological significance of sodium‚ potassium‚ magnesium and calcium. • appreciate The s-block elements of the Periodic Table are those in which the last electron enters the outermost s-orbital. As the s-orbital can accommodate only two electrons‚ two groups (1 & 2) belong to the s-block of the Periodic Table. Group 1 of the Periodic Table consists of the elements: lithium‚ sodium‚ potassium‚ rubidium‚ caesium and francium. They are collectively
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The Beer-Lambert LawWhat the Law looks likeYou will find that various different symbols are given for some of the terms in the equation - particularly for the concentration and the solution length. I’m going to use the obvious form where the concentration of the solution is "c" and the length is "l". | | Note: That’s obviously "l" for length. The font I’m using won’t distinguish between "l" for length and a capital letter "I" (for Intensity). That problem disappears in the equation below - where
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