• 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
Ideas of Modern Physics
Ideas of Modern Physics

Mole Equation Homework Hint: Start equations with the numbers
Mole Equation Homework Hint: Start equations with the numbers

... Hint: Start equations with the numbers given, and pay close attention to what the question is asking you to find. Usually, the first step in most stoichiometry problems (calculation of quantities in chemical equations) is to convert the given numbers to moles. SHOW YOUR WORK!!!!!!!!!!!!!!!!!!!!!!!!! ...
Evolution of Atomic Models
Evolution of Atomic Models

Exam 1 Solutions
Exam 1 Solutions

... Let the initial charge on A and B be called Q. When C is touched to A, because they are identical they each half the total charge or Q/2. Similarly, when C is then touched to B, they each get half the total charge or 3Q/4. Since A and B now have charges Q/2 and 3Q/4, respectively, the force between ...
The Periodic Table HL Page 1 of 3 G. Galvin Name: Periodic Table
The Periodic Table HL Page 1 of 3 G. Galvin Name: Periodic Table

Document
Document

Quantum Mechanics
Quantum Mechanics

Atomic Structure - Winona State University
Atomic Structure - Winona State University

... Line Spectra and the Bohr Model Limitations of the Bohr Model • Can only explain the line spectrum of hydrogen adequately. • Can only work for (at least) one electron atoms. • Cannot explain multi-lines with each color. • Electrons are not completely described as small particles. • Electrons can ha ...
Atoms and Materials for Engineering
Atoms and Materials for Engineering

... draw it properly, then it would be so small that we could not even see it. There are other problems with our drawing in Figure 1. The electrons do not orbit around the nucleus like planets around the Sun. Electrons occupy spaces around the nucleus called orbitals. There are a number of different kin ...
Chapter 4 Bohr`s model of the atom
Chapter 4 Bohr`s model of the atom

... (2) An electron move in an orbit for which its orbital angular momentum is L  n  nh / 2 , n  1,23.., h Planck’s constant (3) An electron with constant acceleration moving in an allowed orbit does not radiate electromagnetic energy. Thus, its total energy E remains constant. (4) Electromagnetic ...
Fall Exam 3
Fall Exam 3

QUANTUM NUMBERS
QUANTUM NUMBERS

... For an electron in an atom with l=0 is said to be in an s state. For an electron in an atom with l=1 is said to be in an p state. For an electron in an atom with l=2 is said to be in an d state. For an electron in an atom with l=3 is said to be in an e state. ...
Chapter 4 Section 1 The Development of a New Atomic Model
Chapter 4 Section 1 The Development of a New Atomic Model

... The Hydrogen-Atom Line-Emission Spectrum, continued • When investigators passed electric current through a vacuum tube containing hydrogen gas at low pressure, they observed the emission of a characteristic pinkish glow. • When a narrow beam of the emitted light was shined through a prism, it was se ...
PPT
PPT

... + and – charges uniformly distributed  electric field felt by alpha never gets too large To scatter at large angles, need positive charge concentrated in small region (the nucleus) ...
De Broglie Waves, Uncertainty, and Atoms
De Broglie Waves, Uncertainty, and Atoms

... Screen a distance L from slits ...
Hydrogen atom
Hydrogen atom

... Starting from the angular momentum quantum rule Bohr[5] was able to calculate the energies of the allowed orbits of the hydrogen atom and other hydrogen-like atoms and ions. Other points are: 1. Like Einstein's theory of the Photoelectric effect, Bohr's formula assumes that during a quantum jump a d ...
Course Description Pre-requests Level Year Number of Study Hours
Course Description Pre-requests Level Year Number of Study Hours

... This course aims to study a variety of topics to illustrate the evolution theory of relativity and quantum theory and modern physics is the science necessary to understand many other sciences, such as spectrum and the atomic structure of the element and many of the Applied ...
Unit 13 - Electrochemistry
Unit 13 - Electrochemistry

... the reducing agent.  - The substance that is reduced is called the oxidizing agent.  - Single replacement and combustion reactions are redox reactions, double replacement is not a redox reaction. ...
Chemistry Final Exam Review 2006-2007
Chemistry Final Exam Review 2006-2007

... Calculate the heat absorbed when 15.0 g of ice melts to liquid. See reference sheet for Hfus b. Calculate the heat released when 75.4 g of vapor condenses into liquid. See reference sheet for Hvap 5. Calculate the heat released or absorbed in a chemical reaction? a) What is the specific heat of a ...
RTD Part 3 - County Central High School
RTD Part 3 - County Central High School

... accelerated toward the next dynode. The process repeats with as much as a millionfold increase in the number of electrons released by the time they reach the collector anode. This provides a strong electrical signal in response to the detection of a single photon. ...
Tomsk state university, Tomsk, Russia.
Tomsk state university, Tomsk, Russia.

... strength of a circular polarized electric field is investigated for He, Ne, Ar and Kr atoms. The electric fields of such polarization are generated in high-frequency discharge and under laser excitation. A theoretical method considered in details in [1] was used for calculation of the wave functions ...
Arrangement of Electrons in Atoms
Arrangement of Electrons in Atoms

N - University of St Andrews
N - University of St Andrews

... for the ground state of Lithium (3 electrons) is We can allocate two electrons in each orbital because the electron has spin ½, i.e. its spin state can be either up or down. So we have two spin states for each orbital. ...
Chapter 12
Chapter 12

... A quantum of energy is the amount of energy required to move an electron to the next highest energy level. The higher the energy level the farther the electron is from the nucleus (usually) Energy levels are more closely spaced further from the nucleus The higher the energy level the easier it is fo ...
The Quantum mechanical model of the atom
The Quantum mechanical model of the atom

... every electron in an atom, we would have a complete “picture” of the atom.  BUT…wave equations are so complex, this is impossible! We can only approximate by predicting. ...
< 1 ... 676 677 678 679 680 681 682 683 684 ... 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