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What else can I help you with?
How many artificial elements are not radioactive?
None - they are all radioactive.
Are all radioactive substances harmful to humans?
just some
All isotopes of the actinide series are what?
All the actinides isotopes are radioactive; and the majority are artificial isotopes.
Are all substances are man made or artificial?
Neither Man-made is the same as artificial The opposite is natural
Is uranium an example of an unstable element?
All the isotopes of uranium (natural or artificial) are radioactive and unstable.
All isotopes of this element are radioactive?
Radioactive Elements (38) These elements are radioactive. They either have no stable naturally occurring isotope, or else are entirely artificial (all artificial elements have no stable isotopes). by Andrew Moore
Is alpha radiation emmitted by all radioactive substances?
No, not all radioactive substances emit alpha radiation. Alpha radiation consists of helium nuclei (two protons and two neutrons) being emitted from the nucleus of an atom. Some radioactive substances emit alpha radiation, while others emit different types of radiation such as beta or gamma radiation.
Are radioactive substances the last period of elements (at the bottom of the chart)?
Radioactive substances are not exclusive to the last period of elements on the periodic table, but many of the heaviest elements, particularly those in the actinide and transactinide series, are radioactive. These elements, found at the bottom of the periodic table, typically have unstable nuclei that decay over time. However, there are also radioactive isotopes of lighter elements scattered throughout the periodic table. Thus, while many radioactive elements are at the bottom, not all radioactive substances belong to this category.
What are the similarities between natural and artificial radioactive?
artificial radioactivity is carried in synthetically produced radioactive elements used in nuclear reactors and accelerators whereas natural radioactivity is a spontaneous process of disintegration of nucleolus of an atom. This process occurs in elements having atomic number greater than 83
What is the problem with disposing of radioactive wastes is that they have a long what?
Radioactive substances have half-lives. This is because the isotope constantly is changing from the radioactive isotope to a daughter element. For example, eventually, when uranium's radioactivity is gone, it becomes lead. After one half life of a radioactive substance, only 50% of that substance is still radioactive. Therefore, after one half-life, a piece of uranium is 50% lead and therefore %50 less radioactive. After another half-life, it has 25% of the original radioactivity, and 75% of the original uranium has become lead. This is the problem with radioactive wastes. It takes many years just for one half lives for some substances, such as uranium. Because radioactivity is harmful, those substances have to be stored until they are no longer radioactive. So, in short, the problem with disposing of radioactive wastes is that they have long half-lives. (although this is not true with ALL substances because some have short half-lives, but, in general, radioactive substances have long half-lives.
What is different about all the elements listed after uranium?
All are radioactive, artificial elements (but note that Np and Pu can exist also naturally in extremely low concentrations).
Is nobelium radioactive?
Yes, nobelium is radioactive. It is a synthetic element that does not occur naturally and is produced in laboratory settings. All isotopes of nobelium are radioactive and have short half-lives, making them highly unstable.
