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Atomic Number

In the modern periodic table, the elements are actually arranged in order of increasing atomic number--that's the number of protons in one atom of a particular element.

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Quantum Numbers, Atomic

Statement of quantum numbers for a hydrogen atom.

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Quantum Numbers

Each electron has a set of four numbers, called quantum numbers, that specify it completely; no two electrons in the same atom can have the same four.

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Nuclear Wallet Cards

A booklet presenting selected properties (atomic number, spin, parity, half life, decay mode) of all known nucleides and their known isomeric states

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Binary Numbers

This site contains a very simple description of binary numbers and binary arithmetic.

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Fibonacci numbers and the golden section

This pages introduces the Fibonacci numbers and why they appear in various "family trees" and patterns of spirals of leaves and seeds. It also covers why the golden section is used by nature in some ...

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Democritus of Abdera

Democritus of Abdera (ca 460 - 370 BC) is best known for his atomic theory. He believed that: ", or the Void, had an equal right with reality to be considered existent. He thought of the Void ...

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The Joy if Pi

No number has captured the attention and imagination of number fanatics and nerds throughout the ages as much as the ratio of a circle's circumference to its diameter. pi. With historical insight and ...

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Atomic Clock

Very accurate clocks can be constructed by locking an electronic oscillator to the frequency of an atomic transition.

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Celebrate Pi Day!

A resource that gives a large number of links to all kinds of sites associated with Pi. Pi day is 14th March, 3/14 in American notation. A large number of links give access to material that can ...

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