92, which is the atomic number or Uranium
Uranium (U) always has 92 protons.
A neutral atom of (^{238}_{92}\text{U}) would have 92 electrons, as the atomic number (92) is equal to the number of protons (positively charged particles) and electrons (negatively charged particles) in a neutral atom.
When U-238 emits an alpha particle, it loses two protons. This results in the atom transforming into a different element (Th-234) which has two fewer protons in the nucleus.
U-238 has 92 electrons. In the Periodic Table it is found at the bottom of the table, in the Actinides Period. Atomic No. 92 is U (Uranium) This number tells us that there are 92 protons and 92 electrons in an atom of uranium . The Atmoic Mass is 238 . This is made up of the total number of protons and neutrons in the nucleus of U . Hence the number of neutrons is 238 - 92 = 146. Uranium exhibits several isotopes. U-235 ; 92 protons , 92 electrons & 143 neutrons U-236 ; 92 protons, 92 electrons & 144 neutrons U-238 ; 92 protons, 92 electrons & 146 neutrons. Notice for all the isotopes of 'U' the number of protons and electrons remains the same at '92' each. It is the different number of neutrons that make for different isotopes. The name 'Uranium' comes from the planet 'Uranus' , which it turn comes from Classical Greek God, 'Uranus', the God of the sky. U
The element uranium (U) has 92 protons in its nucleus. That's where its atomic number comes from. When we see an isotope of an element written in "standard" form, the element name or symbol will be followed by the atomic mass (atomic weight) of the isotope. This number is basically the number of protons and neutrons (called nucleons when they are in an atomic nucleus) in an atom. In this case, we have U-235 and U-238. In the first case, 235 - 92 = 143, so U-235 has 143 neutrons. In the second case, 238 - 92 = 146, so U-238 has 146 neutrons. See the Related Questions below for how to find the number of neutrons in any atom.
Uranium contain 92 protons and electrons.The number of neutrons is 142 inU-234, 143 in U-235 and 146 in U-238.
An isotope means an atom with the same amount of electrons and protons, but with different amount of neutrons.Relative weight of a neutron is 1, a proton is 1, and an electron is very small. So weight of an atom is approx. mneutrons + m protons.So, an uranium-235, as U is the 92th atom in periodic table, contains 92 protons, 92 electrons to be chargeless, and 143 (=235-92) neutrons.An uranium-238, from the definition of isotope, contains 92 protons, 92 electrons, and 146 (=238-92) neutrons.The difference is the 3 neutrons.
Uranium 240 has 92 protons and electrons, but 148 neutrons because the atomic number is 92 and the atomic mass is 240.
All isotopes of uranium have the same number of protons, 92. A nuclide with a number of protons other than that is not uranium.
Between 141 and 146, 146 being the most naturally occurring, that is, U-238, with its 92 protons.
Uranium has two valence electrons; possible valences are 6, 5, 4, 3, 2, 1.
92 protons, 92 electrons.146 neutrons in U-238 isotope.