What is quantum in chemistry?
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the study of the orbitals, waves and electron probabilities.....wavelengths, frequencies when it comes to an atom, ionization, distribution..etc...quite interesting topic
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A quantum computer is any device for computation that makes direct use of distinctively quantum mechanical phenomena, such as superposition and entanglement, to perform operations on data. In a classical (or conventional) computer, the amount of data is measured by bits; in a quantum computer, it is measured by qubits. The basic principle of quantum computation is that the quantum properties of particles can be used to represent and structure data, and that devised quantum mechanisms can be used to perform operations with this data. For a generally accessible overview of quantum computing, see Quantum Computing with Molecules, an article in Scientific American by Neil Gershenfeld and Isaac L. Chuang.\n\nhttp://www.answers.com/topic/quantum-computer?method=22
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It's all about quantum mechanics. Molecules can have a temporarially set speed at which they rotate, expand and contract, or move, but they can not go just a little bit slower or a little bit faster, their speeds are constant unless there is not enough energy to stay at a speed, or enough to "jump" speeds. I believe Philip Ball can describe it best:\n\nWhen a molecule absorbs light, it's energy increases- it gets "hotter," by which I mean that the molecule may shake, jiggle, or spin more vigorously. It is then said to have been "excited" by absorption. The reason why molecules absorb photons of light at some frequencies but not at others is that their motions are determined by the rules of  quantum mechanics, which place restrictions on which motions are allowed. We saw in chapter one (My note: I'm typing this straight from the book, but I can't show all of chapter one) that the electrons in atoms and molecules are not free to adopt any old orbit around the nuclei, with correspondingly arbitrary energies; instead, they are confined to a ladder of specific energy levels, with the energies in between the rungs being forbidden. The electronic energy levels are said to be quantized. In the same way, the energies of the motions that the molecules execute in space may also be quantized. The two-atom oxegyn molecule O2 for example, both rotates (tumbles end over end) and vibrates (the bond between the two atoms stretching and contracting) in free space. The energies associated with these motions may take only certain values, forming a ladder of energy levels like those for the electron energies. As the energies of rotation and vibration depend respectively on the speed of rotation (the number of revolutions per second, say) and the frequency of vibration (the number of in-and-out oscillations per second), the latter two quantities are quantized too. The o2 molecule, terefore, can vibrate only at specific frequencies and spin only at specific speeds. \n\nPhew, that was alot of typing! Yes, I did get that straight out of the book, I didn't copy-paste. He then goes on to explain how the larger an object is, the colser the energy levels are, so there is no real "forbidden zone", and therefore the object can accelerate gradually.\n\nEdit : Sorry about the typos, I'll pick them out as I find them.
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quantum theory\nn.\nA theory in physics based on the principle that matter and energy have the properties of both particles and waves, created to explain the radiation of energy from a blackbody, the photoelectric effect, and the Bohr theory, and now used to account for a wide range of physical phenomena, including the existence of discrete packets of energy and matter, the uncertainty principle, and the exclusion principle. \nAny of various specific applications of this theory.\n\n\nquantum theory, modern physical theory concerned with the emission and absorption of energy by matter and with the motion of material particles; the quantum theory and the theory of relativity together form the theoretical basis of modern physics. Just as the theory of relativity assumes importance in the special situation where very large speeds are involved, so the quantum theory is necessary for the special situation where very small quantities are involved, i.e., on the scale of molecules, atoms, and elementary particles. Aspects of the quantum theory have provoked vigorous philosophical debates concerning, for example, the uncertainty principle and the statistical nature of all the predictions of the theory.\nRelationship of Energy and Matter\n\nAccording to the older theories of classical physics, energy is treated solely as a continuous phenomenon, while matter is assumed to occupy a very specific region of space and to move in a continuous manner. According to the quantum theory, energy is held to be emitted and absorbed in tiny, discrete amounts. An individual bundle or packet of energy, called a quantum (pl. quanta), thus behaves in some situations much like particles of matter; particles are found to exhibit certain wavelike properties when in motion and are no longer viewed as localized in a given region but rather as spread out to some degree.\n\nFor example, the light or other radiation given off or absorbed by an atom has only certain frequencies (or wavelengths), as can be seen from the line spectrum associated with the chemical element represented by that atom. The quantum theory shows that those frequencies correspond to definite energies of the light quanta, or photons, and result from the fact that the electrons of the atom can have only certain allowed energy values, or levels; when an electron changes from one allowed level to another, a quantum of energy is emitted or absorbed whose frequency is directly proportional to the energy difference between the two levels.\n\nDual Nature of Waves and Particles\n\nThe restriction of the energy levels of the electrons is explained in terms of the wavelike properties of their motions: electrons occupy only those orbits for which their associated wave is a standing wave (i.e., the circumference of the orbit is exactly equal to a whole number of wavelengths) and thus can have only those energies that correspond to such orbits. Moreover, the electrons are no longer thought of as being at a particular point in the orbit but rather as being spread out over the entire orbit. Just as the results of relativity approximate those of Newtonian physics when ordinary speeds are involved, the results of the quantum theory agree with those of classical physics when very large “quantum numbers” are involved, i.e., on the ordinary large scale of events; this agreement in the classical limit is required by the correspondence principle of Niels Bohr. The quantum theory thus proposes a dual nature for both waves and particles, one aspect predominating in some situations, the other predominating in other situations.\n\nEvolution of Quantum Theory\n\nEarly Developments\n\nWhile the theory of relativity was largely the work of one man, Albert Einstein, the quantum theory was developed principally over a period of thirty years through the efforts of many scientists. The first contribution was the explanation of black body radiation in 1900 by Max Planck, who proposed that the energies of any harmonic osci
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The quantum for sound is called a phonon. It represents a vibrational state of your system.\n\nYour first phrase 'H is the quantum of energy time' is gobbledegook. Usually, H denotes the hamiltonian and is the energy operator and the infinitesimal generator of time translations.\n\nNext, being quantized and having a quantum are not the same thing. The mass states are quantized, as in comming only in discrete values. There is not a single particle that all the rest are mad eout of. In fact, most quantized quantities do not have corresponding particles.
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Quantum mechanics deals with anything that can come in fixed quanta, which is basically everything if you get small enough!\n\nMass comes in its fundamental particles, but you have other fixed packets of energy that can be treated with particle behaviour.\nA photon is a packet of light.\nA phonon is a packet of vibrational energy.\nEven magnetic flux in a superconductor has a magnetic flux quantum.
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An atom is the smallest chemical entity and the part of an element which preserves its chemical character. \n\nIts parts are Protons, Neutrons, Electrons.
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A polyatomic ion is an ion consisting of a molecule with covalently bonded atoms or of a metal complex that can be considered as acting as a single unit in the context of acid and base chemistry or in the formation of salts.
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It is the quantum mechanical description of conservation of energy principle.
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Here's a great and simple explaination from Wikiopedia: \n\nIn atomic physics and quantum chemistry, the electron configuration is the arrangement of electrons in an atom, molecule, or other physical structure (eg, a crystal).\n\nLike other elementary particles, the electron is subject to the laws of quantum mechanics, and exhibits both particle-like and wave-like properties. Formally, the quantum state of a particular electron is defined by its wavefunction, a complex-valued function of space and time. According to the Copenhagen interpretation of quantum mechanics, a particular electron is both "nowhere at all" and "everywhere all at once" until an act of measurement causes it to be detected. The probability that the act of measurement will detect the electron at a particular point in space is proportional to the square of the absolute value of the wavefunction at that point.\n\nElectrons are able to jump from one energy level to another by emission or absorption of a quantum of energy, in the form of a photon. Because of the Pauli exclusion principle, no more than two electrons may exist in a given atomic orbital; therefore an electron may only leap to another orbital if there is a vacancy there.\n\nKnowledge of the electron configuration of different atoms helps us understand the structure of the periodic table of elements. The concept is also useful for describing the chemical bonds that hold molecules together. And in a macro sense this same idea helps explain the peculiar properties of lasers and semiconductors\n\n\nThe other links are also good sources for review and expaination\n\nGood luck
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Orbitals are solutions to the schrodinger wave equation, quantum mechanics, taking into account translation, number, and rotation, letter.  The rotational levels, s p d f, are from the symmetry of the solutions.  With lower levels of translational energy the higher symmetries do not exist.\n\nsee the source from "Solution of Schrödinger equation: Overview of results" and down for a true mathematical explaination.
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I believe you already asked that a few days ago. But here is a refresher of the best answer yoy chose.:\nChemistry is Chemistry (derived from alchemy) is the science of matter and study of inner molecules and atoms. You study metal properties, its characteristics and behaviour. You study about Organic and InOrganic Materials. You will also learn about mixing chemicals - Reactants and Products. Don't worry now, it will soon become interesting.\n\nThe atomic mass of a chemical element is the mass of an atom at rest and Atomic number (Z) is the number of protons found in the nucleus of an atom.
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Atoms have what are called "orbitals" which are sorts of energy states that electrons can acheive.  A certain set of orbitals are considered the ground state, which is to say that a neutral atom (meaning the atom has as many electrons as protons) will be at its lowest energy state when all electrons occupy the ground state orbitals.  However, an electron can acquire extra energy which will raise the electron to a higher orbital.  This can be done by heat or light.  When an electron is elevated to a higher orbital, it is unstable, and it will eventually drop.  When it drops back down to groundd state, it will release a photon which has a specific amount of energy--the difference in enrgy between the higher and lower orital.\n\nEnergy in a photon relates to its wavelength, and wavelength relates to color.  Hence, for a given type of atom, the transition between two orbitals (which is set by the nucleus involving physical chemistry matters that are way too complex to speel out here) will always require a certain amount of energy, and the relaxation of an electron between those states will always release a photon of a specific color.
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I would suggest you use wikipedia...\n\nhttp://en.wikipedia.org/wiki/Quantum_mechanics
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Little quarks, of sub-atomic size, running around making other quantum size headachs for scientists and mathematicians.\n\nActually, Quantum mechanics is a fundamental branch of theoretical physics that replaces Newtonian mechanics and classical electromagnetism at the atomic and subatomic levels. It is the underlying framework of many fields of physics and chemistry, including condensed matter physics, quantum chemistry, and particle physics. Along with general relativity, it is one of the pillars of modern physics.
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The quantum mind or quantum consciousness is a protoscientific hypothesis that posits a connection between consciousness, neurobiology and quantum mechanics. There are many blank areas in understanding the brain dynamics and especially how it gives rise to consciousness. The hypothesis claims that quantum mechanics is capable of explaining conscious experience.
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Its a chemistry term to describe resonant bonds between atoms in molecules