October 2025

Pauli’s Exclusion Principle: Why Every Electron Needs a Unique Quantum ID

The Pauli Exclusion Principle states that, in an atom or molecule, no two electrons can have the same four electronic quantum numbers. We are aware that in one orbital a maximum of two electrons can be found and the two electrons must have opposing spins. That means one would spin up ( +1/2) and the […]

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Heisenberg’s Uncertainty Principle: Why You Can’t Know Everything at Once

Classical physics was on loose footing with problems of wave/particle duality, but was caught completely off-guard with the discovery of the uncertainty principle. The uncertainty principle also called the Heisenberg Uncertainty Principle, or Indeterminacy Principle, articulated (1927) by the German physicist Werner Heisenberg, that the position and the velocity of an object cannot both be

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Defining the Electron: A Complete Guide to Principal, Azimuthal, Magnetic, and Spin Quantum Numbers

Q uantom numbers are the address of electrons. These are numbers which are used to specify the position and energy of electrons in an atom. Four quantum numbers are usually used to designed the electrons present in an orbital. Principal Quantum Number (‘n’) T his represents the main shells in an atom. This number gives

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The Math Behind Bohr’s Atom: How to Calculate the Radius (r) of Electron Shells

Consider an electron of charge ‘e’ revolving around a nucleus of charge ‘ze’, where ‘z’ is the atomic number and ‘e’ the charge on a proton. Let ‘m’ be the mass of the electron, ‘r’ be the radius of the orbit and ‘v’ the tangential velocity of the revolving electron. The electrostatic force of attraction

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Bohr’s Atomic Model: The Bridge to Modern Physics

The Bohr Model has an atom consisting of a small, positively-charged nucleus orbited by negatively-charged electrons. Here’s a closer look at the Bohr Model, which is sometimes called the Rutherford-Bohr Model Niels Bohr proposed the Bohr Model of the Atom in 1915. Because the Bohr Model is a modification of the earlier Rutherford Model, some

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Engineering Lighter, Stronger Structures with Strenx 700 (S700MC) High-Strength Steel

Strenx 700 steels are a group of high-strength structural steels with a minimum yield strength between 650 and 700 MPa, depending on thickness. Strenx 700 is designed for demanding load-bearing applications, offering: Typical applications include heavy machinery, transportation equipment, lifting and handling components, and structural frameworks where strength and weight savings are critical. Strenx 700 steels meet

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Decoding S355MC: A Guide to High-Strength Low-Alloy (HSLA) Steel for Engineering

S355MC is a hot-rolled, high-strength, low-alloy structural steel designed for cold forming and is specified by the EN 10149-2 standard. Here’s why S355MC steel is widely used and valued: In the steel grade name S355MC: Together, S355MC denotes a structural steel with a minimum yield strength of 355 MPa, microalloyed and optimized for cold forming applications. Property S355MC Steel Yield

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