WHAT'S TRUE. Excessive consumption of spicy snack foods (such as Takis brand corn chips) can lead to stomach pains and gastritis in children. WHAT'S FALSE. Evidence that moderate consumption of such snacks by children carries a significant risk of ulcers or cancer is lacking.
Uranium and the majority of the other heavy elementsâ¦ are formed by stellar nucleosynthesis in novas and supernovas. Heavy elements from the various sources in our galaxy combined with the mass of hydrogen that was the beginning of the formation our solar system around five billion years ago.
In nature, uranium is generally found as an oxide, such as in the olive-green-colored mineral pitchblende. Uranium oxide is also the chemical form most often used for nuclear fuel. Uranium-fluorine compounds are also common in uranium processing, with uranium hexafluoride (UF 6) and uranium tetrafluoride (UF 4) being the two most common. In its pure form, uranium is a silver-colored metal. Uranium Oxides - U 3 O 8 and UO 2. The most common forms of uranium oxide are U 3 O 8 and UO 2. Both oxide forms are solids that have low solubility in water and are relatively stable over a wide range of environmental conditions. Triuranium octaoxide (U 3 O 8) is the most stable form of uranium and is the form most commonly found in nature. Uranium dioxide (UO 2) is the form in