Iodine 131, a radioactive and unstable form
It has 53 protons. In isotopes, the proton number does not change. Only the number of neutrons changes.
The atomic number of an element is determined by the number of protons one of its atoms has. In this case, 53 is the atomic number, which corresponds to Iodine.
Protons tell you the atomic number. Atomic number is 53.
53: The atomic number of an element is defined as the number of protons in the nucleus of an atom of the element.
The atomic number is the number of protons, so the atomic number is 54, and this is the element xenon, Xe.
131I or Iodine
For the isotope carbon-12: 6 protons, 6 neutrons, 6 electrons
A nitrogen atom has 7 protons, 7 electrons and 7 neutrons for the most common isotope
Cl-35 isotope has 18 neutrons Cl-37 isotope has 20 neutrons
The atomic number of francium is 87. This means that it has 87 each of protons and electrons. The number of neutrons depends on the isotope, but the most common one, Fr-223, has 223 - 87 = 136 neutrons. (The number of neutrons is always the isotope mass number minus the atomic number.)
There are 14 protons and 16 neutrons in 30Si and the atom is a stable isotope of silicon.
This is the isotope argon-31.
For the isotope carbon-12: 6 protons, 6 neutrons, 6 electrons
isotope of silver
An atom with 15 protons, 15 neutrons, and 15 electrons.
All the isotopes of uranium contains 92 protons and electrons but a different number of neutrons.
A nitrogen atom has 7 protons, 7 electrons and 7 neutrons for the most common isotope
Radium has 88 electrons. The number of neutrons is different for each isotope: Number of neutrons = Atomic mass of an isotope - 88
Polonium contain 84 protons an electrons and a variable number of neutrons, depending on the isotope.
Boron has 5 electrons and protons; the number of neutrons is specific for each isotope. Number of neutrons in a boron isotope = Mass number - 5
The isotope carbon-12 has 6 protons, neutrons and electrons.
Promethium has 61 protons and electrons; For each isotope the number of neutrons is different. Number of neutrons = Mass number of an isotope - 61
Nitrogen 15 contains: 7 protons 8 neutrons 7 electrons "15" is added to the name because it is an isotope and contains inequal amounts of protons and neutrons (in this case, an extra neutron).