• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Notes on Electron Configurations
Notes on Electron Configurations

Study on Systems of Hydrogen Atoms in the View Point of Natural
Study on Systems of Hydrogen Atoms in the View Point of Natural

... In this paper, we study the derivation of the Schrödinger equation of the system of hydrogen atoms and its solutions which are necessary to analyze the natural statistical phenomena of the system of hydrogen atoms in the basis of the laws of natural statistical physics. Using the above results, we ...
Motion in a Straight Line
Motion in a Straight Line

... acting as a magnifying glass on a TV screen. See how the three colours of dots create the overall pink. ...
Relative formula mass
Relative formula mass

incident angle
incident angle

... The energy of an EM wave is quantized—that is, it’s energy comes packed in a unit, called a photon, that is absorbed or emitted by an atom as a single quantum of energy. A photon’s energy is related to its wavelength: Ephoton = hf, where f is the photon’s frequency, and h is Planck’s constant (h = 6 ...
discrete bose-einstein systems in a box with low adiabatic invariant
discrete bose-einstein systems in a box with low adiabatic invariant

The masses of reactants and products are equal.
The masses of reactants and products are equal.

... That is, the mass of the products appears to be less than the mass of the reactants. In other reactions, the products appear to gain mass. For example, plants grow through a complex series of reactions, but where does their extra mass come from? At one time, scientists thought that chemical reaction ...
2006 - State Examination Commission
2006 - State Examination Commission

Partikül Toplama Cihazları
Partikül Toplama Cihazları

... The ions will continue to bombard a particle until the charge on that particle is sufficient to divert the electric lines away from it. A particle is calle «saturated « when it no longer receives an ion charge. ...
chemistry
chemistry

... 88 Based on Reference Table L, the Ka of H2S is 9.5 ¥ 10–8. This value indicates that H2S is a ...
Module 1 - Hartismere
Module 1 - Hartismere

Bohr vs. Correct Model of Atom
Bohr vs. Correct Model of Atom

Spin-orbit interaction (or “coupling”)
Spin-orbit interaction (or “coupling”)

st3
st3

... not amplified. What is amplified is the number of atoms in the ground state, while the number of atoms in other states decreases. • Atoms interact with each other - that creates additional spreading of the output beam. Unlike light, a matter wave cannot travel far through air. • Atoms are massive pa ...
Document
Document

... • Energy is quantized. It comes in chunks. • A quanta is the amount of energy needed to move from one energy level to another. • Since the energy of an atom is never “in between” there must be a quantum leap in energy. • Schrödinger derived an equation that described the energy and position of the e ...
Atom Components and Chemical Symbols Z A
Atom Components and Chemical Symbols Z A

... 3. Atoms of an element are not changed into atoms of a different element by chemical reactions; atoms are neither created nor destroyed in chemical reactions. 4. Compounds are formed when atoms of more than one element combine; a given compound always has the same relative number and kind of atoms. ...
The Mole
The Mole

... Calculating Empirical Formula from Percent Composition • This is a three step process: • Step 1: Assume that the total mass of the substance is 100g and express the percent of each element in grams. • Step 2: Convert the mass of each element to moles. • Step 3: Convert the mole ratios to whole numb ...
Document
Document

... estimate for v0 at Drude’s time 1 2 mv0  3 2 kBT → v0~107 cm/s → l ~ 1 – 10 Å consistent with Drude’s view that collisions are due to electron bumping into ions at low temperatures very long mean free path can be achieved l > 1 cm ~ 108 interatomic spacings! the electrons do not simply bump off the ...
V - UNH Experimental Space Plasma Group
V - UNH Experimental Space Plasma Group

... thermal plasma) where this is not the case and strong interaction with the plasma occurs, we have to be very careful and rethink our assumption. Generally, this means: long wavelengths and low frequencies are important, i.e. Alfvén waves. We can talk about small deviations of the trajectory in the i ...
AMO-1: Table of Contents Fall 2004, C. D. Lin
AMO-1: Table of Contents Fall 2004, C. D. Lin

12.26MB - Stanford University
12.26MB - Stanford University

... History, Science, and Regulation Chapter 5: Aerosol Particles in Smog and the Global Environment By Mark Z. Jacobson Cambridge University Press, 399 pp. (2002) Last update: March 23, 2005 The photographs shown here appear in the textbook and are provided to facilitate their display during course ins ...
2010 - thephysicsteacher.ie
2010 - thephysicsteacher.ie

... When D1 and D4 are forward biased (and so they will conduct) D2 and D3 are reverse biased (iv) What is observed when the frequency of the a.c. supply is increased to 50 Hz? The diodes flash so fast that the leds appear to light continuously (v) Give two functions of the resistor R. It protects the l ...
Center of mass Equal Masses
Center of mass Equal Masses

9 Systems of Particles
9 Systems of Particles

... Consider the total kinetic energy K  2 mi vi i of a system of particles. This can be rewritten as K = Kcm + Kint, where the first term is the kinetic energy of the center of mass and the second is the kinetic energy relative to the center of mass. ...
Trapping of slow-speed particles in a gas cell by the
Trapping of slow-speed particles in a gas cell by the

... occurs during growth even a highly shallow potential well of the trap. Depending on whether particles have electric (magnetic) moment, it is possible to use the controllable electric (magnetic) field or laser radiation for their trapping. For visual demonstration of the proposed method, at first we ...
< 1 ... 513 514 515 516 517 518 519 520 521 ... 788 >

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.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report