Wave nature of light
... • Young’s experiment (1800) – double-slit – showed interference of light, so concluded, light must be a wave (recall earlier, only waves interfere, particles do not). • Wave theory supported by Maxwell (light =electromagnetic wave, carrying energy), and Hertz’s demo with sparks from electric circuit ...
... • Young’s experiment (1800) – double-slit – showed interference of light, so concluded, light must be a wave (recall earlier, only waves interfere, particles do not). • Wave theory supported by Maxwell (light =electromagnetic wave, carrying energy), and Hertz’s demo with sparks from electric circuit ...
For best results please view this as a slide show. You can hit the F5
... Description of Empirical Formula An empirical formula gives the relative numbers of atoms of each element present in a chemical compound. For example, the formula NaCl, indicates that in this compound there is one Na atom for every Cl. In H2O there are two hydrogen atoms for every oxygen atom. By n ...
... Description of Empirical Formula An empirical formula gives the relative numbers of atoms of each element present in a chemical compound. For example, the formula NaCl, indicates that in this compound there is one Na atom for every Cl. In H2O there are two hydrogen atoms for every oxygen atom. By n ...
Electricity and Magnetism
... of straw. The force, first observed by Thales, is very weak. ► William Gilbert (1544 – 1603) showed that many other materials exhibit this small force. He coined the word “electric” (after the Greek word for amber – electron, or ελεκτρον) for this phenomenon. So etymologically, electricity means “am ...
... of straw. The force, first observed by Thales, is very weak. ► William Gilbert (1544 – 1603) showed that many other materials exhibit this small force. He coined the word “electric” (after the Greek word for amber – electron, or ελεκτρον) for this phenomenon. So etymologically, electricity means “am ...
aq - FCS Physics and Chemistry
... Will Occur In the 2nd column of Table J is a list of nonmetals A nonmetal will replace a less active nonmetal in a ...
... Will Occur In the 2nd column of Table J is a list of nonmetals A nonmetal will replace a less active nonmetal in a ...
Atomic Structure and Periodicity – web
... suggesting the electron had wave properties because that meant that the electron has dual properties. • Werner Heisenberg and Max Born provided the uncertainty principle - if you want to define the momentum of an electron, then you have to forego knowledge of its exact position at the time of the me ...
... suggesting the electron had wave properties because that meant that the electron has dual properties. • Werner Heisenberg and Max Born provided the uncertainty principle - if you want to define the momentum of an electron, then you have to forego knowledge of its exact position at the time of the me ...
Quantum Interference of Molecules
... ics were associated with the black-body radiation spectrum (Planck, 1901), the photoelectric e®ect (Einstein, 1905), the model of the atom (Rutherford, 1911), atomic spectra (Bohr, 1913), scattering of photons o® electrons (Compton, 1922), the exclusion principle (Pauli, 1922), the hypothesis of mat ...
... ics were associated with the black-body radiation spectrum (Planck, 1901), the photoelectric e®ect (Einstein, 1905), the model of the atom (Rutherford, 1911), atomic spectra (Bohr, 1913), scattering of photons o® electrons (Compton, 1922), the exclusion principle (Pauli, 1922), the hypothesis of mat ...
It`s a Quantum World: The Theory of Quantum Mechanics
... Why quantum mechanics? Problems in classical physics that led to quantum mechanics: ...
... Why quantum mechanics? Problems in classical physics that led to quantum mechanics: ...
o Orbital dipole moments. Orbital precession. Spin-orbit interaction.
... In the presence of additional externally magnetic field, these levels are further split (Zeeman effect). ...
... In the presence of additional externally magnetic field, these levels are further split (Zeeman effect). ...
Section 7.5 Quantum Mechanics and the Atom
... physics to explain the behavior of the atom. • This process had already begun with the breaking down of the barrier between light as a wave and matter as a particle. • Einstein showed that light behaves as a particle • The Bohr model is the beginning to the process of treating matter (electrons) as ...
... physics to explain the behavior of the atom. • This process had already begun with the breaking down of the barrier between light as a wave and matter as a particle. • Einstein showed that light behaves as a particle • The Bohr model is the beginning to the process of treating matter (electrons) as ...
量子力學發展史
... Oscillate at the apparent frequency of the radiation since the oscillating electric field should set the electrons in motion ...
... Oscillate at the apparent frequency of the radiation since the oscillating electric field should set the electrons in motion ...
physical setting chemistry
... 37 Which general trends in first ionization energy and electronegativity values are demonstrated by Group 15 elements as they are considered in order from top to bottom? (1) The first ionization energy decreases and the electronegativity decreases. (2) The first ionization energy increases and the ...
... 37 Which general trends in first ionization energy and electronegativity values are demonstrated by Group 15 elements as they are considered in order from top to bottom? (1) The first ionization energy decreases and the electronegativity decreases. (2) The first ionization energy increases and the ...
departmentofmaterials scienceandengineering
... Alkali halides and alkaline earth halides are strongly ionic compounds that solidify as crystals. The name for the alkali elements (Li, Na, K, Rb and Cs) comes from the Arabic word alqili (ashes of the salt-wort plant that was once used as a source of sodium and potassium for making glass from sand) ...
... Alkali halides and alkaline earth halides are strongly ionic compounds that solidify as crystals. The name for the alkali elements (Li, Na, K, Rb and Cs) comes from the Arabic word alqili (ashes of the salt-wort plant that was once used as a source of sodium and potassium for making glass from sand) ...
Chemical Equations Balancing Chemical Equations Try One…
... In a chemical reaction, only 2 things are conserved the number of atoms and the conserved... number of grams. an arrow is used to separate reactants (the starting substances) and the products (what is made), the arrow is the same as an “equals sign” (=) in math for the number of each type of ato ...
... In a chemical reaction, only 2 things are conserved the number of atoms and the conserved... number of grams. an arrow is used to separate reactants (the starting substances) and the products (what is made), the arrow is the same as an “equals sign” (=) in math for the number of each type of ato ...
High Magnetic Field Transport and Photoluminescence in Doped
... Lattice-matched InP/Inx Ga1,x As short period superlattices (x = 0:53) -doped with Si in the middle of the InP barriers were studied. The samples had a high carrier concentration which lled two minibands. In addition to a peak associated with the electrons from the second miniband, E 2, the Shubni ...
... Lattice-matched InP/Inx Ga1,x As short period superlattices (x = 0:53) -doped with Si in the middle of the InP barriers were studied. The samples had a high carrier concentration which lled two minibands. In addition to a peak associated with the electrons from the second miniband, E 2, the Shubni ...
Introduction to Chemistry and the Metric System
... 5 types of reactions: synthesis, decomposition, single replacement, double replacement, combustion monatomic and diatomic elements reactant, product, precipitate, know your solubility rules net ionic equation, spectator ion Problems: 1. Name the reaction type and balance: ______________ a. _ ...
... 5 types of reactions: synthesis, decomposition, single replacement, double replacement, combustion monatomic and diatomic elements reactant, product, precipitate, know your solubility rules net ionic equation, spectator ion Problems: 1. Name the reaction type and balance: ______________ a. _ ...
In the Classroom
... internuclear separation decreases. As will be shown later, the immediate cause of the molecular ground state is a sharp increase in electron kinetic energy. • The amount of electron density transferred to the bonding region is greatly overstated, sometimes implying that a pair of electrons is shared ...
... internuclear separation decreases. As will be shown later, the immediate cause of the molecular ground state is a sharp increase in electron kinetic energy. • The amount of electron density transferred to the bonding region is greatly overstated, sometimes implying that a pair of electrons is shared ...
Atomic theory
In chemistry and physics, atomic theory is a scientific theory of the nature of matter, which states that matter is composed of discrete units called atoms. It began as a philosophical concept in ancient Greece and entered the scientific mainstream in the early 19th century when discoveries in the field of chemistry showed that matter did indeed behave as if it were made up of atoms.The word atom comes from the Ancient Greek adjective atomos, meaning ""uncuttable"". 19th century chemists began using the term in connection with the growing number of irreducible chemical elements. While seemingly apropos, around the turn of the 20th century, through various experiments with electromagnetism and radioactivity, physicists discovered that the so-called ""uncuttable atom"" was actually a conglomerate of various subatomic particles (chiefly, electrons, protons and neutrons) which can exist separately from each other. In fact, in certain extreme environments, such as neutron stars, extreme temperature and pressure prevents atoms from existing at all. Since atoms were found to be divisible, physicists later invented the term ""elementary particles"" to describe the ""uncuttable"", though not indestructible, parts of an atom. The field of science which studies subatomic particles is particle physics, and it is in this field that physicists hope to discover the true fundamental nature of matter.