The only element which has a reasonably abundant isotope with mass number 33 is sulphur and that has 17 neutrons.
The only element which has a reasonably abundant isotope with mass number 33 is sulphur and that has 17 neutrons.
Arsenic has 33 electrons and protons; the number of neutrons is specific for each isotope. Number of neutrons in an arsenic isotope = Mass number - 33
18. Phosphorus has an atomic number of 15, therefore it has 15 protons. Phosphorus-33 has a total of 33 protons and neutron and therefore has 18 neutrons. Phosphorus-33 is a synthetic unstable isotope of P.
Since cobalt has an atomic number of 27, any isotope of it contains 27 protons and 27 electrons per atom. The isotope with mass number 60 contains (60 - 27) or 33 neutrons per atom.
The only naturally occurring isotope of As (atomnumber 33) is As-75 (76 and 77 have decay half-time of several houres)This As-75 has 33 protons, 33 electrons and (75-33 =) 42 neutrons
The more stable polonium atoms have 125 neutrons. As with other elements, polonium atoms can have varying numbers of isotopes (variants with different number of neutrons).Polonium has 33 isotopes ranging from 104 to 136 neutrons.
The 34 protons means that this is the element that has an atomic number of 34, which is selenium. The mass number for the isotope given is 67, which is the sum of the protons and neutrons. Mass number is not the same as atomic mass. Atomic mass is the total mass of the protons, neutrons, and electrons in an atom.
The isotope 60Co: 59, 933 817 1(7)
One can ignore the scant contribution of electrons to atomic mass. Simply add the number of protons and neutrons to obtain 53. Please see the link.
Nickel has 28 protons. An atom of nickel-61 contains 33 neutrons.
The atomic number of an atom is the number of protons, so this atom has an atomic number of 27, which makes it cobalt, with the symbol Co. The isotope of cobalt that contains 27 protons and 27 neutrons has a mass number of 54, which is the sum of the protons and neutrons in the nucleus of the atom.
Atomic mass is equal to the number of protons + neutrons present in the nuclide. The atomic number is defined as the number of protons in the nuclide. Therefore to find the number of neutrons use the formula: atomic mass = #protons + # neutrons solving for # of neutrons you get: # neutrons = atomic mass - # protons plug in the given values: #neutrons = 31 - 15 # neutrons = 16