# Elements are not isotopes, atoms are isotopes of an element. # There are no atoms that are not isotopes, so it's not a matter of being "considered" an isotope or not. # It doesn't matter where the neutrons come from, whatever that means. All atoms are isotopes of some element or other.
Francium 2x + 60 = 234 x = 87 protons. So you have to have 147 neutrons. Francium has 87 protons, and the neutrons come from the isotope.
Uranium has many isotopes and each isotope has a different number of neutrons (N). N = atomic weight of the isotope - atomic number of uranium (A=92) The number of neutrons of the isotope 92U238 is 238-92=146 and the number of neutrons of the isotope 92U235 is 235-92=143.
The element with atomic number eight is oxygen, and anyatom of oxygen is an isotope. Let's see how that works.The word isotope speaks to the number of neutrons in a given atom of a given element. When we speak of oxygen, we might consider any of its isotopes, but all atoms of this element have eight protons in their nucleus. They're all oxygen, and all have atomic number eight. Oxygen has three stable isotopes, and they are O-16, O-17 and O-18. All atoms of these isotopes have eight protons in them, but they have eight, nine and ten neutrons in their nuclei, respectively.
The number of protons in the nucleus of an atom determines the element. The number of neutrons can vary. If two atoms of the same element have a different number of neutrons in their nuclei, they are isotopes of that element.
An element's number of protons is the same as its atomic number. Thus, an atom with 51 protons has the atomic number 51. By looking up this element on the periodic table, one finds that it is antimony.
Several come to mind. They are both found in the nucleus of an atom. Protons have a positive charge, while neutrons have no charge. They are nearly the same size, though neutrons are a bit larger. The sum of the protons and neutrons in an isotope of an element is its mass number.
118. Ihate it when people dont come right out with it
Before we tackle isotopes and neutrons, lets talk about protons. The number of protons in an atom determines the elemental identity of the atom. Only that. Now to the question. Atoms of a given element have a specific number of protons in the nucleus, but can have a modest variety of numbers of neutrons in their nuclei. Let's look at hydrogen. Hydrogen is identified by the fact that there is a single proton in the nucleus. Most hydrogen is just that. But some hydrogen has a neutron stuck to the one proton in the nucleus. This creates another "flavor" of hydrogen. It's another isotope of hydrogen. We have the original isotope of hydrogen (with one proton and no neutron) and the isotope with the one proton and one neutron. Now we look at the last and most unusual isotope of hydrogen. It has the one proton and two neutrons. Hydrogen has three isotopes, and each has the same number of protons (each isotope is hydrogen) and each has a different number of neutrons: zero, one and two. Heavier elements have varying numbers of neutrons in combinations with there protons. This creates a number of different isotopes for each and every element. It is the variable numbers of neutrons that can hang out with the protons in a given element's nucleus that give rise to the different isotopes of that element. Our friends at Wikipedia have some details. A link is provided.
the answer is 21. because you do 40-19
93 protons and 93 electrons; the number of neutrons is different for each isotope. For ex.: 144 neutrons in neptunium 237 Tthe number of neutrons is the difference between the atomic mass of an isotope and the atomic number. the sky is pnk
For simplicity in the study of basic chemistry, atoms are said to consist of protons, electrons and neutrons, of which only protons and neutrons are considered to contribute to the element's atomic weight - that is, the electrons are considered to have essentially no mass are not accounted for when calculating atomic weight due to being overwhelmingly smaller than protons and neutrons. There are other particles to be considered but that will come in more advanced physical chemistry physics studies. EDIT: Corrected and added information.
Uranium 238 is bombarded by neutrons, and forms Neptunium 238. Neptunium decays to form Plutonium 238.