Radioactive Elements and Their Most Stable Isotopes. ... Keep in mind, all elements can have radioactive isotopes. ... A good example of this is tritium, a radioactive isotope of hydrogen naturally present at extremely low levels.

Everything around us is made of elements, or different types of atoms. While these atoms are way too small to see, if you break an object or organism down enough, ultimately everything is made of these tiny particles. And although your coffee table or text book might seem pretty stable, some elements break down over time, including some that make up the objects in your house. These areradioactive elements, meaning that they break down over time by releasing energy and turning into different elements. Let's look at how this process happens.

an element subject to spontaneous degeneration of its nucleus accompanied by the emission of alpha particles, beta particles, or gamma rays. All elements with atomic numbers greater than 83 are radioactive. Naturally occurring radioactive elements include radium, thorium, and uranium. Several radioactive elements not found in nature have been produced by the bombardment of stable elements with subatomic particles in a cyclotron. Compare stable element. See also radioactivity.

This is a list or table of elements that are radioactive. Keep in mind, all elements can have radioactiveisotopes. If enough neutrons are added to an atom, it becomes unstable and decays. A good example of thisis tritium, a radioactive isotope of hydrogen naturally present at extremely low levels. This table contains the elements that havenostable isotopes. Each element is followed by the most stable known isotope and itshalf-life.

Note increasing atomic number doesn't necessarily make an atom more unstable. Scientists predict there may beislands of stabilityin the periodic table, where superheavy transuranium elements may be more stable (although still radioactive) than some lighter elements.This list is sorted by increasing atomic number.

Radioactive Elements

ElementMost Stable IsotopeHalf-lifeof Most Stable IstopeTechnetiumTc-914.21 x 106yearsPromethiumPm-14517.4 yearsPoloniumPo-209102 yearsAstatineAt-2108.1 hoursRadonRn-2223.82 daysFranciumFr-22322 minutesRadiumRa-2261600 yearsActiniumAc-22721.77 yearsThoriumTh-2297.54 x 104yearsProtactiniumPa-2313.28 x 104yearsUraniumU-2362.34 x 107yearsNeptuniumNp-2372.14 x 106yearsPlutoniumPu-2448.00 x 107yearsAmericiumAm-2437370 yearsCuriumCm-2471.56 x 107yearsBerkeliumBk-2471380 yearsCaliforniumCf-251898 yearsEinsteiniumEs-252471.7 daysFermiumFm-257100.5 daysMendeleviumMd-25851.5 daysNobeliumNo-25958 minutesLawrenciumLr-2624 hoursRutherfordiumRf-26513 hoursDubniumDb-26832 hoursSeaborgiumSg-2712.4 minutesBohriumBh-26717 secondsHassiumHs-2699.7 secondsMeitneriumMt-2760.72 secondsDarmstadtiumDs-28111.1 secondsRoentgeniumRg-28126 secondsCoperniciumCn-28529 secondsNihoniumNh-2840.48 secondsFleroviumFl-2892.65 secondsMoscoviumMc-28987 millisecondsLivermoriumLv-29361 millisecondsTennessineUnknownOganessonOg-2941.8 millisecon

This is a list or table of elements that are radioactive. Keep in mind, all elements can have radioactiveisotopes. If enough neutrons are added to an atom, it becomes unstable and decays. A good example of thisis tritium, a radioactive isotope of hydrogen naturally present at extremely low levels. This table contains the elements that havenostable isotopes. Each element is followed by the most stable known isotope and itshalf-life.

Note increasing atomic number doesn't necessarily make an atom more unstable. Scientists predict there may beislands of stabilityin the periodic table, where superheavy transuranium elements may be more stable (although still radioactive) than some lighter elements.This list is sorted by increasing atomic number.

Radioactive Elements

ElementMost Stable IsotopeHalf-lifeof Most Stable IstopeTechnetiumTc-914.21 x 106yearsPromethiumPm-14517.4 yearsPoloniumPo-209102 yearsAstatineAt-2108.1 hoursRadonRn-2223.82 daysFranciumFr-22322 minutesRadiumRa-2261600 yearsActiniumAc-22721.77 yearsThoriumTh-2297.54 x 104yearsProtactiniumPa-2313.28 x 104yearsUraniumU-2362.34 x 107yearsNeptuniumNp-2372.14 x 106yearsPlutoniumPu-2448.00 x 107yearsAmericiumAm-2437370 yearsCuriumCm-2471.56 x 107yearsBerkeliumBk-2471380 yearsCaliforniumCf-251898 yearsEinsteiniumEs-252471.7 daysFermiumFm-257100.5 daysMendeleviumMd-25851.5 daysNobeliumNo-25958 minutesLawrenciumLr-2624 hoursRutherfordiumRf-26513 hoursDubniumDb-26832 hoursSeaborgiumSg-2712.4 minutesBohriumBh-26717 secondsHassiumHs-2699.7 secondsMeitneriumMt-2760.72 secondsDarmstadtiumDs-28111.1 secondsRoentgeniumRg-28126 secondsCoperniciumCn-28529 secondsNihoniumNh-2840.48 secondsFleroviumFl-2892.65 secondsMoscoviumMc-28987 millisecondsLivermoriumLv-29361 millisecondsTennessineUnknownOganessonOg-2941.8 millisecon

radioactive element is uranium or plutonium etc.

Elements such as uranium, palladium, thorium are radioactive elements

Uranium, thorium, and palladium are radioactive elements.

Uranium thorium and palladium are radioactive elements

Uranium thorium and palladium are radioactive elements

Uranium thorium and palladium are radioactive elements

Uranium thorium and palladium are radioactive elements

uranium thorium and palladium are radioactive elements