On the Folder tab, in the Properties group, click Folder Properties. On the Outlook Address Book tab, clear the Show this folder as an e-mail Address Book check box. If you want to turn Suggested Contacts off, do the following: Click the File tab.
Best Answer: U-238 is by far the most common isotope of Uranium found naturally, 99.284%. It has 238 nucleons, 92 of which are protons. The remaining 146 are neutrons. U-235, which accounts for 0.711% of all Uranium found naturally, is the useful one for fission reactors (and bombs), has 235 - 92 = 143 neutrons. U-234 is also found in extremely small quantities, 0.0058%, and has 142 neutrons.
Rocks that contain a lot of uranium are called uranium. ore, or pitch-blende. Uranium, although abundant, is a nonrenewable. energy source. Three isotopes of uranium are found in nature, uranium-234, uranium-235, and uranium-238. These numbers refer to the number of. neutrons and protons in each atom. Uranium-235 is the form commonly. used for energy production because, unlike the other isotopes, the. nucleus splits easily when bombarded by a neutron.