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topic 03 outline YT 2010 test
... B. The Bohr Atomic Model 1. Explaining the existence of line spectra The Bohr model was based on a simple postulate, Bohr applied to the hydrogen atom the concept that the electron can exist only in certain energy levels without an energy change but that, when the electron changes its state, it mu ...
... B. The Bohr Atomic Model 1. Explaining the existence of line spectra The Bohr model was based on a simple postulate, Bohr applied to the hydrogen atom the concept that the electron can exist only in certain energy levels without an energy change but that, when the electron changes its state, it mu ...
Document
... One cannot weigh a single atom, but it is possible to determine the mass of one atom relative to another ...
... One cannot weigh a single atom, but it is possible to determine the mass of one atom relative to another ...
Metals and non-metals III IMPORTANT POINTS Non-metals
... 1. a. Magnesium, chromium and sodium are all metals, hence, they react with oxygen to form basic oxides b. Chromium, as it is a transition metal. Metals have high density and coloured compounds are formed by transition metals. c. Bromine - the formula is Br2, that is, two atoms of bromine. d. Bromin ...
... 1. a. Magnesium, chromium and sodium are all metals, hence, they react with oxygen to form basic oxides b. Chromium, as it is a transition metal. Metals have high density and coloured compounds are formed by transition metals. c. Bromine - the formula is Br2, that is, two atoms of bromine. d. Bromin ...
1 - College of Arts and Sciences
... • ACCURACY refers to how closely a measured value agrees with the correct value • PRECISION refers to how closely individual measurements agree with one another. ...
... • ACCURACY refers to how closely a measured value agrees with the correct value • PRECISION refers to how closely individual measurements agree with one another. ...
1 - College of Arts and Sciences
... • ACCURACY refers to how closely a measured value agrees with the correct value • PRECISION refers to how closely individual measurements agree with one another. ...
... • ACCURACY refers to how closely a measured value agrees with the correct value • PRECISION refers to how closely individual measurements agree with one another. ...
final exam review packet
... Be able to identify formulas as ionic or metallic Be able to draw electron dot diagrams of ions ...
... Be able to identify formulas as ionic or metallic Be able to draw electron dot diagrams of ions ...
J - X-ray and Observational Astronomy Group
... • Arises due to interaction between nuclear spin angular momentum and the electron total angular momentum. – combined spin angular momentum of nucleus called I • associated nuclear spin quantum number I (0, half-integer or integer) • Iz given by projection quantum number mI which ranges from –I ...
... • Arises due to interaction between nuclear spin angular momentum and the electron total angular momentum. – combined spin angular momentum of nucleus called I • associated nuclear spin quantum number I (0, half-integer or integer) • Iz given by projection quantum number mI which ranges from –I ...
Ch 5 Electron ppt
... • When electrons in the ground state gain energy, they can move a greater distance from the nucleus to an excited state. • When the electrons lose the gained energy they fall back to the ground state and release the energy in the form of radiation. ...
... • When electrons in the ground state gain energy, they can move a greater distance from the nucleus to an excited state. • When the electrons lose the gained energy they fall back to the ground state and release the energy in the form of radiation. ...
amu (atomic mass unit): a unit used to express very small masses
... Niels Bohr's ideas of electron distribution within the atom are useful concepts and laid the foundation for much of the later progress in understanding atomic structure. But, as is the case with many theories, Bohr's assumptions have had to be modified. Difficulty arose in applying the theory to at ...
... Niels Bohr's ideas of electron distribution within the atom are useful concepts and laid the foundation for much of the later progress in understanding atomic structure. But, as is the case with many theories, Bohr's assumptions have had to be modified. Difficulty arose in applying the theory to at ...
MID-TERM EXAM REVIEW! Unit 1 Convert the following: 1.) 2.02 x
... * Classify as element, compound, solution, or heterogeneous mixture. 8.) Flat soda 9.) Potassium iodide 10.) Iodine 11.) Potassium iodide completely dissolved in water 12.) Soil 13.) Chromium * Classify as chemical or physical changes. 14.) Shredding cheese 15.) Melting cheese 16.) Digesting cheese ...
... * Classify as element, compound, solution, or heterogeneous mixture. 8.) Flat soda 9.) Potassium iodide 10.) Iodine 11.) Potassium iodide completely dissolved in water 12.) Soil 13.) Chromium * Classify as chemical or physical changes. 14.) Shredding cheese 15.) Melting cheese 16.) Digesting cheese ...
atomicspectra1-2
... • The multiplicity of the L term is equal to 2S + 1 = 2s + 1 = 2.: doublet : two levels, with J = L ± 1/2, respectively • The Coulomb interaction between the nucleus and the single electron is dominant, so that the largest energy separations are associated with levels having different n • hyperfine ...
... • The multiplicity of the L term is equal to 2S + 1 = 2s + 1 = 2.: doublet : two levels, with J = L ± 1/2, respectively • The Coulomb interaction between the nucleus and the single electron is dominant, so that the largest energy separations are associated with levels having different n • hyperfine ...
- Catalyst
... 4. The ____________________________ of an element has the units g/mole. 5. Smallest unit of an element is a(n) _________________________________. 6. The __________________________ of an element is one or two letters found on the periodic table. 7. Isotopes have the same number of ____________ ...
... 4. The ____________________________ of an element has the units g/mole. 5. Smallest unit of an element is a(n) _________________________________. 6. The __________________________ of an element is one or two letters found on the periodic table. 7. Isotopes have the same number of ____________ ...
Chapter 37 Early Quantum Theory and Models of the Atom
... This model had the atom consisting of a bulk positive charge, with negative electrons buried throughout. Rutherford did an experiment that showed that the positively charged nucleus must be extremely small compared to the rest of the atom. He scattered alpha particles – helium nuclei – from a metal ...
... This model had the atom consisting of a bulk positive charge, with negative electrons buried throughout. Rutherford did an experiment that showed that the positively charged nucleus must be extremely small compared to the rest of the atom. He scattered alpha particles – helium nuclei – from a metal ...
Introduction to Nanoscience
... This hollow space, ranging from 0.4 to 1.0 nm in diameter on going from C60 to C240 considering the van der Waals radius of carbon (0.17 nm), is nanometer-scale void and the volume may be varied with the size of fullerene. Such a characteristic of fullerene implies intuitively an idea of ...
... This hollow space, ranging from 0.4 to 1.0 nm in diameter on going from C60 to C240 considering the van der Waals radius of carbon (0.17 nm), is nanometer-scale void and the volume may be varied with the size of fullerene. Such a characteristic of fullerene implies intuitively an idea of ...
Unit 1 PowerPoint Complete Notes
... Chemistry has its own language. Chemists communicate in this language to describe the millions of known compounds. This communication depends on a standard system of naming and writing the formulas for compounds. Chemists formed a group to standardize the system of naming and called themselves the I ...
... Chemistry has its own language. Chemists communicate in this language to describe the millions of known compounds. This communication depends on a standard system of naming and writing the formulas for compounds. Chemists formed a group to standardize the system of naming and called themselves the I ...
Lecture 21 revised (Slides) October 12
... Transition Metal Configurations • The unexpected electron configurations found experimentally for Cu and Cr are often rationalized in terms of a special stability (low energy) associated with a half full (3d5) and full (3d10) d subshell. Similar issues arise with transition metal ions. The large nu ...
... Transition Metal Configurations • The unexpected electron configurations found experimentally for Cu and Cr are often rationalized in terms of a special stability (low energy) associated with a half full (3d5) and full (3d10) d subshell. Similar issues arise with transition metal ions. The large nu ...
elements in a family have the same number of
... Ex- sodium has 11 electrons. How many are in it’s outermost level? ...
... Ex- sodium has 11 electrons. How many are in it’s outermost level? ...
Chapter 6 Electronic Structure of Atoms
... orbital with a doughnut around the center. Electronic Structure of Atoms ...
... orbital with a doughnut around the center. Electronic Structure of Atoms ...
The Language of Chemistry
... large in size on the order of 100’s of cm. Atoms and molecules are “microscopic”: on the order of 10-12 cm ...
... large in size on the order of 100’s of cm. Atoms and molecules are “microscopic”: on the order of 10-12 cm ...
Chemical bond
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 electrostatic force of 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 interaction, the London dispersion force and hydrogen bonding.Since opposite charges attract via a simple electromagnetic force, the negatively charged electrons that are orbiting the nucleus and the positively charged protons in the nucleus attract each other. An electron positioned between two nuclei will be attracted to both of them, and the nuclei will be attracted toward electrons in this position. This attraction constitutes the chemical bond. Due to the matter wave nature of electrons and their smaller mass, they must occupy a much larger amount of volume compared with the nuclei, and this volume occupied by the electrons keeps the atomic nuclei relatively far apart, as compared with the size of the nuclei themselves. This phenomenon limits the distance between nuclei and atoms in a bond.In general, strong chemical bonding is associated with the sharing or transfer of electrons between the participating atoms. The atoms in molecules, crystals, metals and diatomic gases—indeed most of the physical environment around us—are held together by chemical bonds, which dictate the structure and the bulk properties of matter.All bonds can be explained by quantum theory, but, in practice, simplification rules allow chemists to predict the strength, directionality, and polarity of bonds. The octet rule and VSEPR theory are two examples. More sophisticated theories are valence bond theory which includes orbital hybridization and resonance, and the linear combination of atomic orbitals molecular orbital method which includes ligand field theory. Electrostatics are used to describe bond polarities and the effects they have on chemical substances.