Iodine 131, a radioactive and unstable form
There are 7 protrons, 7 electrons and 7 electrons in an atom of nitrogen.
For the isotope carbon-12: 6 protons, 6 neutrons, 6 electrons
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.)
Cl-35 isotope has 18 neutrons Cl-37 isotope has 20 neutrons
There are 14 protons and 16 neutrons in 30Si and the atom is a stable isotope of silicon.
This is the isotope argon-31.
An atom with 15 protons, 15 neutrons, and 15 electrons.
isotope of silver
Radium has 88 electrons. The number of neutrons is different for each isotope: Number of neutrons = Atomic mass of an isotope - 88
There are 7 protrons, 7 electrons and 7 electrons in an atom of nitrogen.
The natural isotope of carbon 13C (abundance 1,1 %) has 6 protons, 6 electrons and 7 neutrons.
Polonium contain 84 protons an electrons and a variable number of neutrons, depending on the isotope.
For the isotope carbon-12: 6 protons, 6 neutrons, 6 electrons
As for all other elements: neutrons, protons and electrons.
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