Radon-222, or 222Rn.
The number of neutrons is different for each isotope: Number of neutrons = Atomic mass of the isotope - 86 The isotope 222Rn, the most stable (half life = 3,8 days) radon isotope, has 136 neutrons.
The chemical element, Radon, has an atomic number of 86, meaning it has 86 protons. Were there an isotope of Radon that had 136 neutrons, it would be labeled as 222Rn. Well, it turns out that this isotope does exist and has a half-life of 3.82 days.
The most stable francium isotope (Fr-223) has 87 protons and 136 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.
Radon has 86 protons, 86 electrons.Rn-222 isotope has 136 (222 - 86 = 136) neutrons
The number of neutrons is different for each isotope: Number of neutrons = Atomic mass of the isotope - 86 The isotope 222Rn, the most stable (half life = 3,8 days) radon isotope, has 136 neutrons.
Francium has 87 protons; the number of neutrons is different for each isotope and francium has approx. 40 isotopes and isomers. Number of neutrons = Atomic mass of the isotope - 87
The chemical element, Radon, has an atomic number of 86, meaning it has 86 protons. Were there an isotope of Radon that had 136 neutrons, it would be labeled as 222Rn. Well, it turns out that this isotope does exist and has a half-life of 3.82 days.
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.)
The most stable francium isotope (Fr-223) has 87 protons and 136 neutrons.
Francium has 87 protons and electrons; the number of neutrons is different for each isotope and francium has ca. 40 isotopes ad isomers. Number of neutrons = Atomic mass of the isotope - 87
Francium has 87 positively charged protons and 87 negatively charged electrons, plus a varying number of uncharged neutrons, of which 136 is the commonest amount. Number of neutrons = Atomic mass of the isotope - 87
Californium has 98 electrons and 98 protons; the number of neutrons is different for each isotope of Cf.
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.
Radon has 86 protons, 86 electrons.Rn-222 isotope has 136 (222 - 86 = 136) neutrons
The ratio of neutrons to protons in a nucleus of radon-222 can be calculated by subtracting the atomic number from the mass number. For radon-222, the atomic number is 86 and the mass number is 222. Therefore, the ratio of neutrons to protons in radon-222 is 222 - 86 = 136 neutrons to 86 protons.
There are 19 known isotopes of americium, with neutron counts ranging from 136 to 154. Americium-241, the easiest to produce, has 146 neutrons. Number of neutrons = Atomic weight (rounded) of an americium isotope - 95 Each isotope has a different number of neutrons. Americium has also 95 protons and electrons.