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What are the names of the elements that have atoms too large and unstable to occur naturally?
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∙ 10y ago
These are the artificial radioactive chemical elements.
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∙ 10y ago
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Why radioactive materials are unstable?
Radioactive metals are unstable as their nuclei is large and do not have a strong binding force as the smaller elements. If a neutron is collided onto a radioactive nuclei, they split into smaller atoms like Uranium splits into Barium and Krypton. Since they are unstable, they have a half life of varying times which range from the age of the earth to nanoseconds for recently discovered elements
Why is uranium radioactive?
Positives repel each other. In an atom, the nucleas is full repelling protons with their positive charge. It is the nuclear force that holds them together in the nucleus. A Helium atom has only 2 protons which makes it more stable.Uranium on the other hand, has 92 protons all squashed together. This makes it very unstable which allows it to undergo gamma radiation.That is why Uranium is radioactive.Unstable atoms as uranium are radioactive; the stability depends on the ratio between protons and neutrons.
When are all atoms radioactive?
An atom "becomes" radioactive when it is created. It's that simple. Radioactivity is a phenomenon associated with atoms that have unstable nuclei. The key is that the protons and neutrons that form the nucleus "don't like" the "arrangement" there and the atomic nucleus is unstable. The "ratio" of protons to neutrons in a nucleus is intrinsically unstable. The instability is something that the nucleus, when it is formed (and by whatever means), has as an innate quality. It is unstable, and it isradioactive, and at some point in time, it will undergo decay, or even spontaneous fission, in the case of certain atoms, like uranium and plutonium.
Does aluminum have large atoms?
all atoms are generally the same size, so "large atoms" would mean molecules.
Which is capable of independent existence an atom or molecule?
Atoms of most elements are not able to exist independently. Atoms form molecules or ions aggregate in large numbers to form the matter that we can see. Molecule is capable of independent existence.
Can you site examples of nuclear change?
* formation of rutherfordium * fusing of atoms under intense heat and pressure inside a star * radioactive decay of unstable atoms to form new elements * breaking apart of large, unstable atoms in a fission bomb * cosmic rays * nuclear fission and nuclear fusion
Why radioactive materials are unstable?
Radioactive metals are unstable as their nuclei is large and do not have a strong binding force as the smaller elements. If a neutron is collided onto a radioactive nuclei, they split into smaller atoms like Uranium splits into Barium and Krypton. Since they are unstable, they have a half life of varying times which range from the age of the earth to nanoseconds for recently discovered elements
Do atoms have the same properties as an element?
All atoms are elements. Single (or even a "few") atoms do not have the properties of large masses of atoms.
Which elements on the periodic table have the lowest electronegativity?
Atoms to the left on the periodic table Atoms with a large atomic radius
What elements are natural made?
In theory, all elements are naturally made, but many of the large ones have decayed into smaller elements over billions of years
What is the process which describes the splitting of a large unstable atom into two intermediate size atoms and extra neutrons called?
Nuclear fission
The process which describes the splitting of a large unstable atom into two intermediate size atoms and extra neutrons is called?
The process which describes the splitting of a large unstable atom into two intermediate size atoms and extra neutrons is called nuclear fission. Nuclear fission is a nuclear reaction or a radioactive decay process.
Why is uranium radioactive?
Positives repel each other. In an atom, the nucleas is full repelling protons with their positive charge. It is the nuclear force that holds them together in the nucleus. A Helium atom has only 2 protons which makes it more stable.Uranium on the other hand, has 92 protons all squashed together. This makes it very unstable which allows it to undergo gamma radiation.That is why Uranium is radioactive.Unstable atoms as uranium are radioactive; the stability depends on the ratio between protons and neutrons.
Which of the following elements tend to be radioactive?
Ra and Ac Pu and Th Am and U
Do all elements decay over time?
It is the unstable isotopes of elements that decay over time. All elements have an isotope or isotopes that are unstable and will decay over time. (These isotopes will be either naturally occurring or will be synthetic.) Some isotopes of some elements, however, are stable, and they will not undergo radioactive decay.To discover what's what, we have to do some homework, and what better place to start than the table of nuclides? It lists all the elemets, and all the isotopes of each element. Further, it tells us which ones are stable, which are unstable, and will also help us determine the decay mode of the unstable nuclides.
What makes an element unstable or radioactive?
The stability of an atom depends on a balance between the numbers of protons and neutrons in its nucleus and also on the total size of its nucleus; atoms with sufficiently large nuclei are inherently unstable. Please see the link.
The process by which describe the splitting of a large unstable atom into two intermediate size atoms and extra neutrons is called?
Fission to be more specific its nuclear fission...
