Number of neutrons in an atomic nucleus = Atomic Mass of an isotope - Number of protons in the nucleus
For uranium the number of protons is 92; each isotope has of course a different mass.
Uranium 235 has 92 protons and 92 electrons. To find the number of neutrons, follow this equation: Mass # - Atomic # = # of neutrons. Since the mass number of uranium 235 is 235 and has an atomic number of 92, the number of neutrons is 143.
Uranium has many isotopes and each isotope has a different number of neutrons (N). N = atomic weight of the isotope - atomic number of uranium (A=92) The number of neutrons of the isotope 92U238 is 238-92=146 and the number of neutrons of the isotope 92U235 is 235-92=143.
You need to find the atomic number, and the atomic mass. The atomic number i the number of PROTONS in the nucleus, the atomic mass, or mass number, is the number of PROTONS and NEUTRONS in the nucleus. To find the number of neutrons you subtract the atomic number from the mass number.
Number of neutrons = Atomic mass of an isotope - Number of protons (Atomic number)
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.
One quick way to find that out is to open the Wikipedia and type "Isotopes of Carbon", "Isotopes of Uranium", or whatever element you are interested in. Please note that each element has several different isotopes; the number of neutrons varies from one isotope to another.
The element is Uranium , the symbol is (U). The charge is +1 because:Atomic number(Z): # of protons (92), which also tells you what element it is in the periodic table.Ion charge: # of protons (92) - # of electrons (91) = 1Mass number(A): # of protons (92) + # of neutrons (143) =235
The mass number is the sum of protons and neutrons in the atomic nucleus.
The mass number is the sum of protons and neutrons in the atomic nucleus.
The mass number is the sum of neutrons and protons in the atomic nucleus.
The mass number is the sum of protons and neutrons in the atomic nucleus.
The number 33 in "3316S" represents the atomic number of sulfur, which is the number of protons in its nucleus. To find the number of neutrons, subtract the atomic number from the atomic mass. In this case, the atomic mass is 16, so there are 16 - 33 = 16 neutrons in the nucleus.