to CHANGE in regards to these observations contradicting to the theory put forward by Dalton. The distribution of charge and mass in an atom |Particle |Location |Mass |Charge | |Electron |Orbitals |1/1837 unit |-1 unit | |Proton |Nucleus |1 unit |+1 unit | |Neutron |Nucleus |1 unit |0 | [pic] Terminology |Term
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Chem 170 Exam 2 Review Chapters 5‚ 11-13 Instructions: You are allowed to use a scientific calculator to perform mathematical operations. Please silence and put away all cell phones and pagers! Part I. This section is multiple-choice. Fill in the letter corresponding to the best answer on your Scantron form #882. 1. The __________ and __________ contribute most to the mass of an atom‚ while the _____________ determines the atom’s chemical behavior. A. B. C. D. E. proton‚ neutron‚ electron proton
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and melting points of both of these products. Both of these compounds involve a carbon-carbon double bond that is composed of one σ bond and one π bond. The overlap of sp2 hybrid orbitals forms the σ bond‚ and one empty p orbital forms the π bond. This process is illustrated in the figure below: Sp2 hybrid orbitals: Unhybridized p orbital: (3 σ bonds) (1 π bond) _1 _1 _1 _1 Molecules with double bonds are alkenes‚ and they have restricted rotation around the double bond so they tend
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electron configuration for the following atoms (see page 135 in your textbook): Mg Ne Zn 2. Which elements have the following electron configurations? a. 1s22s2 b. 1s22s22p63s23p1 3. Sketch the shape of the following orbitals: s p d 4. Define the term “quantum.” 5. Using the diagram of the atom‚ on the right‚ identify the following: a. Which arrow(s) indicate that electrons absorbed energy? b. Which arrow(s) indicate that electrons lost/emitted energy as light? c. What does arrow B indicate?
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according to the equation: 2 Al + 3 Cl2 2 AlCl3 ? How many neutrons are there in 131I? Which bond is the most polar? I-Cl I-Br I-S I-I Circle the molecules that are polar (have a dipole moment): CCl4 CH4 H2O NH3 HBr CHCl3 CCl2F2 How many unpaired electrons does the Si atom have? Write the correct Lewis structure for CS2. Write the formal charges on each atom in [F-S=F]2+ (lone pairs are not shown). How many ions are formed when Ca3(PO4)2 dissolves
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both of the planets is made up of hot‚ have dense water‚ ammonia‚ and methane. Both contain two layers‚ which are the core and the mantle. The mantels of the two planets are‚ “…mostly made of a very thick‚ sweltering combination of water(H2O)‚ ammonia(NH3)‚ and methane(CH4) over a possible heavier‚ Earth-sized‚ solid core” (Neptune: Overview). There are also some contrasting features between Neptune and Uranus. Neptune has fourteen moons‚ Triton‚ Nereid‚ Proteus‚ Thalassa‚ Larissa‚ Psamathe‚ Galatea
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Chemistry Final Study Guide Matter as anything that has mass and takes up space. Significant figures refers to digits that were measured. When rounding calculated numbers‚ we pay attention to significant figures so we do not overstate the accuracy of our answers. Rules: -All nonzero digits are significant. -Zeroes between two significant figures are themselves significant. -Zeroes at the beginning of a number are never significant. -Zeroes at the end of a number are significant if a decimal
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Semester 1 Revision The list below will assist you to check your understanding of the main concepts studied in Semester One. Work carefully through the list below and make sure that you can do what the statement says. This is not a course summary. It is a checklist for you to use to identify areas where you need extra work and a guide for your study. Macroscopic properties of matter I can | | | Classification
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example of a homeostatic mechanism in humans‚ and explain it fully‚ by providing a diagram followed by a complete essay explanation. 7. Demonstrate what is meant by "anatomical position". 8. Define various directional terms (i.e. superior‚ inferior‚ etc.)‚ and compare different body parts using these terms (i.e. the elbow is proximal to the wrist). 9. List both anterior and posterior anatomical landmarks (i.e. orbital‚ inguinal‚ etc.). 10. Name the three major body sections (planes‚ cuts)‚ and
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Substitution Reactions of Molybdenum Hexacarbonyl and the Use of Infrared Spectroscopy as a Structural Tool 01-09-2011 Abstract A variety of metal carbonyl derivatives can be synthesized by substitution reactions. In this experiment two geometric [Mo(CO)4(PPh3)2] isomers A and B were synthesized and their molecular geometries were determined by means of infrared spectroscopy. Isomer A was synthesized first by reacting [Mo(CO)6] with sodium borohydride employed as a reducing agent and triphenylphosphine
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