Wavelength‚ frequency‚ and amplitude and energy. As a person in science‚ i should know the order of colours in the visible spectrum and the span of visible wavelengths. Question: if light is a .. Answer: max planck proposed that e.m radiation comes in units of defined energy rather than in any arbitrary quantities. Planck called it quantum The Photoelectric Effect Planck’s theories were used to explain a number of observations that had been troubling scientists. Einstein extended
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CHEMISTRY 17 1ST LONG EXAM REVIEWER I. ELECTRONIC STRUCTURE OF ATOMS -arrangement of atoms’ electrons -the number of electrons in an atom -distribution of electrons around the nucleus and their energies • ATOMS *Billiard Ball Model (JOHN DALTON) *Plum Pudding Model (JOSEPH J. THOMPSON) *RUTHERFORD’s Model of Atom -atoms are tiny‚ hard‚ indivisible spheres -electrons (negative charge) occupy the atom - Atom is mostly empty space with a dense nucleus • PROBLEMS with Rutherford’s Model
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html http://dwb4.unl.edu/chemAnime/atomic_orbits.htm http://www.mhhe.com/physsci/chemistry/essentialchemistry/flash/hybrv18.swf Salient Features Chemistry animation and videos Atomic orbital animations Hybridization animation http://jchemed.chem.wisc.edu/JCEDLib/WebWare/collection/open/JCEWWOR019/mo Molecular orbital theory animations movies.html http://www.mhhe.com/physsci/chemistry/essentialchemistry/flash/activa2.swf http://dwb4.unl.edu/chemAnime/Electro.htm Activation energy animation Electrochemistry
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CH 16 - the name of this functional group class is historically derived from the pleasant aromas associated with many of its constituent compounds discovered in past centuries - although not all aromatic compounds known today share the same distinction (many are in fact‚ odorless or even unpleasant)‚ they are the principle components in such pleasant smelling substances as cinnamon‚ licorice‚ wintergreen‚ clove & vanilla CLASSIFICATION – - also known as arenes‚ many aromatic compounds possess
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Pages: 1 – 11 SECTION A Answer ALL THIRTY questions from this section 1. If you move one element to the right on the periodic table which ONE of the following is always TRUE? A. an extra electron is added to a previously empty orbital B. the charge on the atom increases by 1 C. the number of neutrons increases by 1 D. the number of protons increases by 1 E. all of the above 2. Which ONE of the following best describes what happens when an electron moves to a lower energy
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CHEMISTRY 1. States of Matter: Solid‚ liquid and gaseous states(general characteristics)‚ Change of states‚ effect of change of temperature and pressure on states of matter‚ evaporation‚ mixture‚ solution‚ its type and its concentration(percent strength by volume and by mass)‚ separation of components from a mixture using various physical methods‚ physical and chemical changes‚ compounds 1. NCERT class IX text book (chapter 1 and 2) 2. Foundation Science(Chemistry) :Class IX A. K. Singh ( Bharati
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notice the trans-alkenes in small rings. 60 Chemistry S-20 Week 1 Carbocation Stability 1. Draw the structure of the methyl cation‚ CH3+. Describe the hybridization‚ geometry‚ and orbitals in this species. H H H Carbon is sp2-hybridized‚ with 120° bond angles and a vacant p-orbital. 2. Each of the following carbocations is significantly more stable than
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change when it moves closer 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
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Name:____________________________ CHM 1045: Exam 4 – Chapters 9 & 10 Chapter 9: Chemical Bonding I – Lewis Theory 1. Which of the following statements is TRUE? a) A covalent bond is formed through the transfer of electrons from one atom to another. b) A pair of electrons involved in a covalent bond are sometimes referred to as "lone pairs." c) It is not possible for two atoms to share more than two electrons. e) A covalent bond has a lower potential energy than the two separate atoms. d) Single
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When ml can only equal 1‚ each energy level can have only 1 orientation so according to the exclusion principle only 2 electrons with opposite spins can be in each orbital. So in order to get to element 30 you would need to go all the way to the 6p orbitals. In other words‚ every two electrons would necessitate going to a new orbital. 1 | 1s1 | 11 | 1s2 2s2 2p2 3s2 3p2 4s1 | 21 | 1s2 2s2 2p2 3s2 3p2 4s2 3d2 4p2 5s2 4d2 5p1 | 2 | 1s2 | 12 | 1s2 2s2 2p2 3s2 3p2 4s2 | 22 | 1s2 2s2 2p2 3s2 3p2 4s2
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