GaP or GaAs? (You may wish to use a bond-type triangle to discuss this point.) -GaP 6. Rank the following LEDs that you used in lab in terms of increasing lattice spacing. (Lattice spacing reflects the average bond length between the III-V type atoms in the solid.) GaP 0.40As0.60‚
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to the nucleus? 2. The principle quantum number indicates what property of an electron? 3. What shape are s orbitals and p orbitals? 4. What is the maximum number of f orbitals in one energy level of an atom? 5. What is the maximum number of d orbitals in one principal energy level of an atom? 6. What is the maximum number of orbitals in a p sublevel? 7. What is the maximum number of electrons in the second principal energy level (n=2)? 8. What happens when an electron moves from a lower to
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quantities. Atom - the smallest unit of matter that still retains the properties of an element. Neutrons - electrically neutral Protons - one unit of positive charge Electrons - one unit of negative charge Atomic Nucleus - the center of an atom Dalton - the same as the atomic mass unit or amu. Atomic Number - the number of protons‚ which is unique to that element Mass Number - the sum of protons plus neutron in the nucleus of an atom. Atomic Mass - the total mass of an atom. Isotopes
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electrons. It is the sharing of electrons from each atom that define the chemical bond. Because all bonds involve the sharing of electrons‚ we can say that all bonds are covalent. It’s just that some are more polar that others and some are very‚ very polar. It is the latter which take on some of the characteristics of an ionic bond. The ionic and covalent bonds are known to be the strongest chemical bonds. An ionic bond forms when two atoms differ so much in electronegativity that one or more
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Matter: anything that has mass and takes up space Particle Theory: the scientific statements that summarize about particles of matter 1. All matter is made up of particles that contain spaces between each particle 2. Different substances are made up of different types of particles 3. Particles are always in constant motion 4. The movement of particles will increase if temperature rises 5. Particles are attracted to each other Pure substance: a substance that consists of only 1 type of particle
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Discussion no. 2 The Nomenclature of Inorganic Compounds Discussion no. 3 The Periodic Table of Elements Sta. Maria‚ Yza Suaco‚ Trisha Marie T. Teves‚ Joan Marie Vale‚ Kate IN-9 Group 9 I. Introduction Representing molecules as images allows us to impart a great deal of information concerning molecular structure. But these molecules can also be named‚ and there are occasions when this is more convenient than drawing a picture. In the early days of chemistry‚ the list of known compounds
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As scientists started researching atoms‚ many had different ideas on what was actually going on inside the atoms and what the atoms looked like. A few of these scientists were Niels Bohr‚ J.J. Thompson‚ John Dalton‚ and Earnest Rutherford. These four men defined what atomic theory was with all the research and experiments they did. They each came up with ideas about atoms. John Dalton: John Dalton was born September 6‚ 1766. Dalton’s father worked as a weaver‚ his father owned a small plot of land
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case of conjugation that leads to an especially stable bonding arrangement. The benzene ring consists of six sp2 hybridized carbon atoms in a regular hexagon. Each carbon forms two σ-bonds with adjacent carbons‚ and a third σ-bond with a hydrogen atom. The 2p orbital on each atom is available for π-bonding. Interaction between the p orbitals on the six carbon atoms forms a conjugated system of π-electrons. Molecules with this bonding arrangement are called aromatic molecules. For convenience
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favour of the Rutherford atomic model‚ this model has electrons orbit the tiny positive nucleus. 3. Provide a comprehensive description of the gold foil experiment that Rutherford and his associates used to further investigate the structure of the atom. Rutherford had a piece of gold foil and the opposite to gold‚ a zinc sulfide screen that emits a flash of light when hit by an alpha particle‚ the gold was placed in front of the screen and with a gap between the two as too not touch‚ most of the
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Introductory Chemistry‚ 2e (Tro) Chapter 9 – Electrons in Atoms and the Periodic Table True/False Questions 1) When the elements are arranged in order of increasing number of protons‚ certain sets of properties recur periodically. 5) A particle of light is called a packet. 9) Ultraviolet light produces suntans and sunburns. 13) Electrons behave like particles and we can describe their exact paths. 17) The ground state is when an electron in an atom is excited into the lowest possible vacant orbital. 21)
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