Oxygen-18.
30 10 protons 10 neutrons 10 electrons
Neon has 10 protons and 10 electrons per atom. 20Ne is its most common isotope. It has 20 - 10 = 10 neutrons.
The element is Neon and the isotope is 10Ne19
Any atom, ion, or isotope with 12 protons is going to be magnesium. Only the number of protons in the nucleus will determine the element. But with the information about the number of neutrons, the specific isotope can also be determined - 22Mg.
In-115 isotope has 66 neutrons
9 protons, 9 electrons and 10 neutrons in F-19 isotope.
Fluorine has an atomic number of 9. Therefore it has 9 protons and electrons. It has an atomic mass of 19 amu. Therefore, the number of neutrons present can be calculated by subtracting the number of protons from its mass, i.e., 19-9=10. thus, fluorine has 9 protons and 10 electrons.
Neon has 10 electrons and protons; the number of neutrons is specific for each isotope. Number of neutrons in a neon isotope = Mass number - 10
10 Protons 10 Neutrons in the most common isotope.
The element with 10 protons is neon (atomic number 10). Since the number of protons is equal to the number of electrons in a neutral atom, neon also has 10 electrons. With 12 neutrons, the isotope of neon described is neon-22.
Neon-22 has 10 protons, so it also has 10 electrons to balance the charge. To find the number of neutrons, subtract the number of protons (10) from the isotope's mass number (22). Therefore, Neon-22 has 12 neutrons.
The number of protons is the same as the atomic number, which is nine in this case. If the atom is neutral, then the number of electrons will balance the number of protons, also nine in this case. Usually, the number of neutrons will vary with the isotope (atoms with a different number of neutrons) however, fluorine has only one natural isotope, 18F, with nine neutrons.See link below for more information on fluorine, as well as the related question below that will show you how to find the number of each subatomic particle in any atom.