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  2. Atom - Wikipedia

    en.wikipedia.org/wiki/Atom

    Atoms can attach to one or more other atoms by chemical bonds to form chemical compounds such as molecules or crystals. The ability of atoms to attach and detach from each other is responsible for most of the physical changes observed in nature. Chemistry is the science that studies these changes.

  3. Ball-and-stick model - Wikipedia

    en.wikipedia.org/wiki/Ball-and-stick_model

    In chemistry, the ball-and-stick model is a molecular model of a chemical substance which displays both the three-dimensional position of the atoms and the bonds between them. [1] The atoms are typically represented by spheres , connected by rods which represent the bonds.

  4. Aufbau principle - Wikipedia

    en.wikipedia.org/wiki/Aufbau_principle

    In atomic physics and quantum chemistry, the Aufbau principle (/ ˈ aʊ f b aʊ /, from German: Aufbauprinzip, lit. 'building-up principle'), also called the Aufbau rule, states that in the ground state of an atom or ion, electrons first fill subshells of the lowest available energy, then fill subshells of higher energy.

  5. Chemistry - Wikipedia

    en.wikipedia.org/wiki/Chemistry

    Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.

  6. Nuclear fission product - Wikipedia

    en.wikipedia.org/wiki/Nuclear_fission_product

    The sum of the atomic mass of the two atoms produced by the fission of one fissile atom is always less than the atomic mass of the original atom. This is because some of the mass is lost as free neutrons, and once kinetic energy of the fission products has been removed (i.e., the products have been cooled to extract the heat provided by the reaction), then the mass associated with this energy ...

  7. Trump border czar Tom Homan says he's willing to jail Denver ...

    www.aol.com/trump-border-czar-tom-homan...

    Incoming border czar Tom Homan says he's willing to throw Denver Mayor Mike Johnston in jail over his protests about mass deportation. Homan's comments come after Mayor Johnston said he was ...

  8. Target must face shareholder lawsuit over Pride backlash ...

    www.aol.com/target-must-face-shareholder-lawsuit...

    The lawsuit accused Target's board of directors of overlooking the risk of negative backlash and led the company to lose over $25 billion in market capitalization.

  9. College Football Playoff rankings: Ohio State slips, Miami ...

    www.aol.com/college-football-playoff-rankings...

    The fates of Ohio State and Miami were the two major unknowns entering the College Football Playoff rankings that revealed the future of the field.