Atomic Spectra

Bohr model has its ability to predict the spectra of light emitted by atoms. In particular, its ability to explain the spectral lines of atoms as the absorption and emission of photons by the electrons in quantized orbits.

 Courtesy: http://abyss.uoregon.edu

Nuclear Fission and Fusion

Top: Uranium-235 combines with a neutron to form an unstable intermediate, which quickly splits into barium-144 and krypton-89 plus three neutrons in the process of nuclear fission. Bottom: Deuterium and tritium combine by nuclear fusion to form helium plus a neutron.

© Merriam-Webster Inc.

Courtesy: http://www.britannica.com

Filtration

Filtration into a Conical Flask

Courtesy: Ken Partridge

Titration

Courtesy: Dr. Mike Thompson

Changes of States

Courtesy: Chris Evans, QEGS Blackburn

Mole-Box Diagram

Courtesy: Dr. Mike Thompson

Generate Quantum Numbers

Do you want to generate quantum numbers for an electronic configuration? Click on Quantum Number Primer below. It's an excellent illustration.

Quantum Number Primer

Courtesy: http://www.shsu.edu

Pnictogens

Courtesy: http://crescentok.com

The Elements

The Elements — Quick Descriptions, Uses and Occurrences

Courtesy: http://elements.wlonk.com/ElementUses.htm?_notoolbar

World's Smallest Periodic Table

Periodic Table of Elements

You can find an excellent description of Modern Periodic Table of Elements with orbitals, properties and isotopes information here.

Courtesy: http://www.ptable.com/

Elements - Just on Click

Learn more about how the elements of the periodic table are related to each other by clicking on them.

Courtesy: http://www.sheppardsoftware.com

Fourty Two Substances that Can Kill You Beyond a Certain Limit

42 Substances that can kill you beyond a certain Limit

Halogens

Courtesy: http://www.physchem.co.za

Chalcogens

Courtesy: http://www.physchem.co.za

Inert Gases

Courtesy: http://www.physchem.co.za

Mendeleev’s Periodic Table

Mendeleev’s table as published in 1869, with many gaps and uncertainties

Courtesy: http://www.aip.org/history/curie/periodic.htm

Evolution of Atomic Theory

Courtesy: http://www.scienceclarified.com

Alkaline Earth Metals

Courtesy: http://www.physchem.co.za

Elements in the Human Body

Elemental composition of human body

Courtesy: The University of Waikato

Nuclide chart – Enhanced knowledge of the elements\' radioactivity - News & events - JRC - European Commission

Nuclide chart – Enhanced knowledge of the elements\' radioactivity - News & events - JRC - European Commission: 

New edition of the Karlsruhe nuclide chart

Born Haber Cycle for NaCl

 Courtesy: Dr. Mike Thompson

Nano-scale transport | Royal Society Summer Science Exhibition 2012

Nano-scale transport | Royal Society Summer Science Exhibition 2012

Group 1 - Alkali Metals

Group 1 elements

Courtesy: http://www.learner.org/interactives/periodic/

Sensing bubbles | Royal Society Summer Science Exhibition 2012

Sensing bubbles | Royal Society Summer Science Exhibition 2012

Nobel Laureates in Chemistry - Series 2

Quantum of spin | Royal Society Summer Science Exhibition 2012

Quantum of spin | Royal Society Summer Science Exhibition 2012

Alpha, Beta and Gamma rays deflection

Courtesy: http://www.tutorvista.com

X-ray Radiation

X-rays are produced as a result of changes in the positions of the electrons orbiting the nucleus, as the electrons shift to different energy levels. 

Courtesy: University of Michigan, Student Chapter of the Health Physics Society

Mole Concept

Courtesy: http://aphschem.blogspot.in

Van Arkel Triangle

Courtesy: Dr. Mike Thompson

Formation of Beryllium Chloride

Courtesy: Chris Evans, QEGS Blackburn

Elemental composition of the Earth's surface

Elemental composition of the earth’s surface [includes the crust, oceans and atmosphere].

• Oxygen                               49.1%
• Silicon                                26.1%
• Aluminum                           7.5%
• Iron                                      4.7%
• Calcium                               3.4%
• Sodium                                2.6%
• Potassium                            2.4%
• Magnesium                          1.9%
• Hydrogen                           0.88%
• Titanium                            0.58%
• Chlorine                             0.19%
• Carbon                               0.09%
• All others                            0.56%

Orbital Box Diagram

Electron filling in atomic orbitals following Aufbau principle [or building-up principle], Pauli exclusion principle [or Antisymmetry principle] and Hund's rule of maximum multiplicity.

Courtesy: Richard C. Banks, Professor of Chemistry, Boise State University.

Electronegativity of Halogens

Courtesy: Dr. Mike Thompson

Solvay Congress of 1927

The most famous conference held on October 1927, Fifth Solvay International Conference on Electrons and Photons, where the world’s most notable physicists met to discuss the newly formulated quantum theory. 

Courtesy: http://www.dailymail.co.uk

Set of 3d orbitals

Courtesy: Dr. Mike Thompson

Atomic Orbitals

1 S orbital

P orbital

Courtesy: Chris Evans, QEGS Blackburn

Higgs boson buzz hits new high

Higgs boson buzz hits new high

 Proton on proton collision in the Large Hardon Coliider's 
ATLAS detector with four muons indicated by red tracks

 Courtesy: Alan Boyle (http://cosmiclog.msnbc.msn.com/)

Stern-Gerlach Experiment

Click to Run

Courtesy: PhET Interactive Simulations, University of Colorado,
                http://phet.colorado.edu/

Electronic configuration from Hydrogen to Calcium

Courtesy: Dr. Mike Thompson

RSC Visual Elements Periodic Table

RSC Visual Elements Periodic Table