алкални земни метали

алкални земни метали

Element in the second column of the periodic table (from the left.)

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Industrie/Domein: Astronomy
Category: General astronomy
Company: Caltech
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Fine jewelry and jewelry settings are crafted of metal. Common metals include gold, silver, platinum and titanium. Metals can be used in pure form or combined to increase ...

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Lens (or combination of lenses) that brings different wavelenghts within a ray of light to a single focus, thus overcoming chromatic aberration. It was first successfully made by ...

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1) Active galactic nuclei are very luminous. Their energy output is in two forms: nonthermal continuum and thermal emission line. 2) Any galaxy which is emitting large quantities ...

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A unit for measuring acceleration, which is metre per second squared.

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The theory by which planetesimals are assumed to collide with one another and coalesce, eventually sweeping up enough material to form the planets.

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Industrie/Domein: Arts & crafts Category: Oil painting

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