Uranium 99.9% 1 gram

Uranium 99.9% 1 gram

 

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Available for sale here is Uranium 99.9% 1 gram:

Uranium is a chemical element with the symbol U and atomic number 92, classified as a silvery-white actinide metal that is dense, weakly radioactive, and the heaviest naturally occurring element by atomic weight.

It consists primarily of three isotopes—uranium-238 (over 99%), uranium-235 (about 0.7%), and uranium-234 (trace amounts)—all of which decay radioactively over billions of years, with uranium-235 being fissile and capable of sustaining a nuclear chain reaction upon neutron absorption.

Uranium occurs naturally in low concentrations (around 2–4 parts per million) throughout the Earth’s crust, soils, rocks, and waters, but is commercially extracted from uranium-bearing minerals such as uraninite through mining and chemical processing into forms like yellowcake for further refinement.

Discovered in 1789 by German chemist Martin Heinrich Klaproth from pitchblende ore and named after the planet Uranus, the element’s salts were isolated in 1841 by Eugène-Melchior Péligot, while its radioactivity was first observed in 1896 by Henri Becquerel, marking a pivotal moment in the discovery of nuclear phenomena.

Since the mid-20th century, uranium has powered nuclear reactors for electricity generation—providing a high-energy-density, low-carbon fuel source—and served as the core material in atomic weapons due to the fission of enriched uranium-235, though its mining, enrichment, and waste management raise environmental and proliferation concerns rooted in empirical health risks from radiotoxicity and chemical toxicity.

Uranium (U) possesses atomic number 92, positioning it as the third actinide in the periodic table after thorium and protactinium. Its ground-state electron configuration is [Rn] 5f³ 6d¹ 7s², featuring valence electrons in f, d, and s orbitals that contribute to its chemical reactivity and multiple oxidation states ranging from +3 to +6.

This configuration arises from the filling of the 5f subshell, characteristic of actinides, leading to complex electronic interactions and relativistic effects that contract the orbitals and influence bonding, with an electronegativity of 1.38 (Pauling scale), atomic radius of 156 pm (empirical, corresponding to a diameter of approximately 312 pm or 3.12 Å; values vary by definition such as empirical, covalent, or van der Waals, with other sources giving an empirical radius of 175 pm and diameter of ~350 pm), first ionization energy of 6.19 eV, and typical ionic radii of 89 pm for U⁴⁺ and 73 pm for U⁶⁺ (effective, coordination number 6).

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