Principles of distributing electrons:
Auf-beau principle: electrons occupy the sublevels of lower energy first then of higher one
This diagram predicts the following order of increasing energy for atomic orbitals
Saturday, May 29, 2010
Aerogel materials AND (Aerogel Capture Medium)
Silica Aerogels:
With the primary mission of Stardust being to capture dust particles from Wild 2, the Aerogel capture material is one of the most important parts of the craft. Travelling at up to 12.8km/s, the particles possess huge kinetic energy. The aerogel material must strip this energy from the particles without allowing them to alter their composition by being heated or pulverized.
With the primary mission of Stardust being to capture dust particles from Wild 2, the Aerogel capture material is one of the most important parts of the craft. Travelling at up to 12.8km/s, the particles possess huge kinetic energy. The aerogel material must strip this energy from the particles without allowing them to alter their composition by being heated or pulverized.
Friday, May 28, 2010
Quantum Numbers
Quantum Numbers: They define:
The volume of space (orbital) where there is maximum probability of finding the electrons.
The energy of each orbital
The shape of each orbital
The direction of each orbital
Modern atomic theory
Modern atomic theory:
Based on:
Based on:
(Wave-Particle Dualism) the dual nature of the electron
Heisenberg Uncertainty Principle
The dual nature of the electron
Wave-Particle Duality/The Two-Slit Experiment/Electrons:
According to classical physics, electrons should behave like particles - the travel in straight lines and do not curve in flight unless acted on by an external agent, like a magnetic field. In this model, if we fire a beam of electrons through a double slit onto a detector, we should get two bands of "hits", much as you would get if you fired a machine gun at the side of a house with two windows - you would get two areas of bullet-marked wall inside, and the rest would be intact.
According to classical physics, electrons should behave like particles - the travel in straight lines and do not curve in flight unless acted on by an external agent, like a magnetic field. In this model, if we fire a beam of electrons through a double slit onto a detector, we should get two bands of "hits", much as you would get if you fired a machine gun at the side of a house with two windows - you would get two areas of bullet-marked wall inside, and the rest would be intact.
Wednesday, May 26, 2010
Future Designer laptop - ROLLTOP //Diploma Thesis//
The device of the flexible display allows a new concept in notebook design growing out of the traditional bookformed laptop into unfurling and convolving portable computer.
By virtue of the OLED-Display technology and a multi touch screen the utility of a laptop computer with:
By virtue of the OLED-Display technology and a multi touch screen the utility of a laptop computer with:
Its weight of a mini-notebook
Screen size of 13 inch easily transforms into the graphics tablet, which with its 17-inch flat screen
Can be also used as a primary monitor.
On top of everything else all computer utilities from power supply through the holding belt to an interactive pen are integrated in Rolltop.
Tuesday, May 25, 2010
Drive your Carrrrrrrrrrrr with iPhone, Power Wheels, Laptop
Before u see the video:
The goal of this project is to be able to remotely control an automobile. This involves building:
The goal of this project is to be able to remotely control an automobile. This involves building:
An automobile control system (ACS)
A remote system that sends commands to the ACS.
How to Detect period number, group number, block and type of any element
How to Detect period number, group number, block and type of any element only by its Atomic Number:
Monday, May 24, 2010
Saturday, May 22, 2010
Bohr's planetary model
Bohr's planetary model:
He:
1. Developed Rutherford's atomic model
2. Did not consider the properties of electron in classical mechanics theory of Newton as Maxwell had done (by assumption of the continuous radiation of electron) must end up the destruction of the atomic system
Atomic spectra
To solve the puzzle of the atomic structure, we must study the atomic emission spectraWhite light is not actually white – it consists of many different colors. The composition of light – its spectrum – is studied by a device called a spectrometer
Diffraction grating
When there is a need to separate light of different wavelengths with high resolution, then a diffraction grating is most often the tool of choice. This "super Prism" aspect of the diffraction grating leads to application for measuring Atomic Spectra in both laboratory instruments and telescopes.
Rutherford's atom
Rutherford's atom:
Experiment:
Experiment:
He beamed alpha particles through gold foil and detected them on a screen
Discovery of cathode rays
Discovery of cathode rays
Discharge tube experiments:
Structure:
1.A cylindrical glass tube about 50 cm long, closed at both ends called the discharge tube2.The tube is fitted with two metallic electrodes, which are connected to a source of high voltage3.It is filled with gas and the discharge tube is connected to a side tube, through which the gas can be evacuated to any desired pressure with the help of a vacuum pump
Structure of Atom
Greek philosopher:
All matter can be divided into smaller parts
Each part can be subdivided into smaller parts and further into smaller one and so on until reaching undividable fragment called ATOM which means in Greek language (no divide)
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