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When atoms encounter such red-detuned laser light, they experience a "light shift", which creates a spatially dependent potential energy landscape. In the context of optical molasses, the term "molasses" refers to the slowing down of atoms, analogous to how molasses slows down the movement of objects moving through it.
"IBM" spelled out using 35 xenon atoms. IBM in atoms was a demonstration by IBM scientists in 1989 of a technology capable of manipulating individual atoms. [1] A scanning tunneling microscope was used to arrange 35 individual xenon atoms on a substrate of chilled crystal of nickel to spell out the three letter company initialism. It was the ...
As even the most massive atoms are far too light to work with directly, chemists instead use the unit of moles. One mole of atoms of any element always has the same number of atoms (about 6.022 × 10 23). This number was chosen so that if an element has an atomic mass of 1 u, a mole of atoms of that element has a mass close to one gram.
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The scientists at IBM Research – Almaden who made the film are moving atoms to explore the limits of data storage because, as data creation and consumption gets bigger, data storage needs to get smaller, all the way down to the atomic level. Traditional silicon transistor technology has become cheaper, denser and more efficient, but ...
Chemical substances will form bonding interactions if their orbitals become lower in energy when they interact with each other. Different bonding orbitals are distinguished that differ by electron configuration (electron cloud shape) and by energy levels. The molecular orbitals of a molecule can be illustrated in molecular orbital diagrams.
Generally this work involves using quantum mechanics. For molecular physics, this approach is known as quantum chemistry. One important aspect of molecular physics is that the essential atomic orbital theory in the field of atomic physics expands to the molecular orbital theory. [5]
Repeating units will help to show how easy it is and clear it is to represent molecules through balls that represent atoms. The binary compounds sodium chloride (NaCl) and caesium chloride (CsCl) have cubic structures but have different space groups. This can be rationalised in terms of close packing of spheres of different sizes.