What is being asked for is a Table of Nuclides. Thousands and thousands of hours of meticulous work went into assembling the requested information, and it is a large body of work. The National Nuclear Data Center at the Brookhaven National Laboratory has an interactive chart, and a link is provided. A wish for success in the mastery of the ideas represented in the table is extended, and most sincerely so.
alpha decay
Curium {Note correct spelling} is only element in the list given that is radioactive and synthetic.^ not correct answer and not even spelled right the correct answer is "lawrencium"The rare earth elements are located at the bottom of the periodic table and are comprised of the lanthanoid series and the actinoid series.The actinoid series is the second row of rare earth elements. All of these elements are radioactive, and all of these elements (except actinium, thorium, protactinium, and uranium) are synthetic.
Yes, there is. In fact, there are several lists. See, the thing is that some elements are radioactive "across the board" like uranium is. All of the different isotopes of uranium are radioactive. But some elements have several isotopes that are stable, and some that are radioactive, or a "mixed bag" if you will. Just getting a "list" per se might be a mess. How are you going to list all those radioactive isotopes of all those elements? Well, there's good news. The table of nuclides (or table of radionuclides) has all the elements and all their isotopes. It's a pretty good sized table, to be sure, but it's been around and is available on the web in a number of places. One is from the Brookhaven National Laboratory's site for the National Nuclear Data Center. A link is provided to that one. Note that each little "square" on the chart is "active" and clicking on it pulls up the data on that isotope, whatever it is. There are other tools for use to extract data from the chart. Short cut If you just want to know which elements have no stable isotopes and which, therefore, are radioactive in any form, they include 43technetium and 61promethium, and all elements above 83bismuth. Simple and easy.
Potassium-argon dating is a method used to determine the age of rocks based on the decay of radioactive potassium-40 into argon-40. By measuring the ratio of these isotopes in a sample, scientists can calculate how long it has been since the rock formed. This dating technique is commonly used to date volcanic rocks and minerals.
You think probable to the list of of chemical elements.
Radioactive elements break down in to stable isotopes through nuclear decay. The list of isotopes from a nuclear isotope to a stable isotope is called its decay chain.
Elements that decay (give off protons and neutrons) to form other elements. *It's not elements as such that are stable or unstable, but rather isotopes. Even elements of small atomic number have unstable isotopes that undergo radioactive decay, for example carbon-14. Elements with higher atomic numbers than Lead (82) are naturally radioactive in all isotopes. Bismuth (83) has an extremely long half-life, but the time generally becomes shorter (the decay more rapid) as the size of the nucleus gets progressively larger for heavier radioactive elements.
Answerelements with a nonstable isotope or at least one naturally occurring isotope that is radioactive. AnswerAll elements have radioactive isotopes.There are a lot of radioactive elements: Technetium, Promethium, Polonium, Astatine, Radon, Francium...Here is the whole list: http://periodictable.com/Elements/Radioactive
No, trace elements are not necessarily radioactive. A link to a list of elements that have no natural radioactive isotopes is at a related question, below.
alpha decay
Huh? Every element can potentially be radioactive.Here is a list of all of the naturally occurring (above trace levels) radioactive elements:bismuthpoloniumastatineradonfranciumradiumactiniumthoriumprotactiniumuranium
Curium {Note correct spelling} is only element in the list given that is radioactive and synthetic.^ not correct answer and not even spelled right the correct answer is "lawrencium"The rare earth elements are located at the bottom of the periodic table and are comprised of the lanthanoid series and the actinoid series.The actinoid series is the second row of rare earth elements. All of these elements are radioactive, and all of these elements (except actinium, thorium, protactinium, and uranium) are synthetic.
any one or a combination of radioactive substances that gives off photons that are usually considered harmful to humans and other life forms
Yes, there is. In fact, there are several lists. See, the thing is that some elements are radioactive "across the board" like uranium is. All of the different isotopes of uranium are radioactive. But some elements have several isotopes that are stable, and some that are radioactive, or a "mixed bag" if you will. Just getting a "list" per se might be a mess. How are you going to list all those radioactive isotopes of all those elements? Well, there's good news. The table of nuclides (or table of radionuclides) has all the elements and all their isotopes. It's a pretty good sized table, to be sure, but it's been around and is available on the web in a number of places. One is from the Brookhaven National Laboratory's site for the National Nuclear Data Center. A link is provided to that one. Note that each little "square" on the chart is "active" and clicking on it pulls up the data on that isotope, whatever it is. There are other tools for use to extract data from the chart. Short cut If you just want to know which elements have no stable isotopes and which, therefore, are radioactive in any form, they include 43technetium and 61promethium, and all elements above 83bismuth. Simple and easy.
Most radioactive elements when kept in dark will glow to some extent. Radium could be thought of the highest glowing radioactive element out of all. Radioactive elements undergo spontaneous emission of either alpha, beta particles or gamma rays
A radioactive element has unstable atomic nuclei. These nuclei will decay according to the decay scheme for that given element under inspection. Depending on the type of decay, an alpha particle (a helium-4 nucleus), or a beta particle (an electron or a positron, depending) may be ejected from the nucleus. This will result in nuclear transformation. With each decay, a "new" nuclear configuration will appear, and these nuclei will, if they are also unstable, undergo further radioactive decay along what is called a decay chain. With continued decay, the atoms will change and reach the end of the chain, and this will be signaled by the appearance of a stable atomic nucleus.
A half-life is the time it takes for half of the substance to decay, becoming something else. You can find a list of half-lives in the Wikipedia article "List_of_isotopes_by_half-life".