If element X has 91 protons, it is element Protactinium (Pa) on the Periodic Table. In a neutral atom, the number of electrons equals the number of protons, so element X would also have 91 electrons.
U234 occurs naturally in small amounts, 0.0054 percent of total U. 1/2 life is 245,500 years. Number of protons 92 (as for all U isotopes), neutrons 142, electrons 92.
The atomic number for the element Protactinium (Pf) is 91.
Mo (Molybdenum) Atomic number: 42; Atomic Mass: 91
AnswerThere are 40 protons in the element "zirconium". There are a number of isotopes of Zr, with the most common having an atomic weight (protons plus neutrons) of 90, with 94 and 92 tied for second place. That leaves 50 neutrons as most common, with 52 or 54 neutrons as alternatives.
It would be actinium with 89 protons and a mass of 230.
91. Atomic number is equal to the number of protons.
Protactinium has 91 protons and electrons; the number of neutrons is different for each isotope: Number of neutrons = Atomic Mass of the isotope - 91
In the natural form, it is Zr with 40 protons, 51 neutrons and 40 electrons. . But some isotopes have an atomic mass of 91 too.
The element proactinium-231 has 140 neutrons (element number 91, 91 protons).
Protactinium has 91 electrons; the valence is 4 or 5.
U234 occurs naturally in small amounts, 0.0054 percent of total U. 1/2 life is 245,500 years. Number of protons 92 (as for all U isotopes), neutrons 142, electrons 92.
Protactinium has 91 protons.
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
155 particles 47 protons 47 electrons 61 neutrons
40 protons and 40 electrons.The most stable isotope of zirconium (Zr-91) has 51 protons.
That depends on what element it's an atom of. In a neutral atom of Hydrogen . . . 1 In a neutral atom of Uranium . . . 92 In a neutral atom of any other naturally occuring element . . . between 2 and 91.
Protactinium has 91 protons.