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Polonium is often considered to be the most radioactive element, but there are far more radioactive elements like nobelium and lawrencium. However, the most radioactive elements are man-made like ununtrium and ununseptium. Out of these, ununoctium is the most radioactive but scientists are continuing to make even more radioactive elements today.

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14y ago
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15y ago

K40 (potassium) when it does beta capture / positron emission, produces about 20 daughter photons of various energies. Beyond this there are lots of heavy elements that go through a series of decays (alpha and beta emissions) over a fairly short period. "Most" implies that we have enough of any given isotope to make a value judgment.... normally we don't.

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11y ago

Elements of the lanthanide and actinide series are the most radioactive. These include many elements that have such short half lives that they are never observed outside the laboratory (and are observed with great difficulty even within the laboratory). Some elements can only exist for a fraction of a second before they undergo radioactive decay.

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9y ago

The heaviest element that is still very radioactive is Radium (Ra). Radium is an alkaline earth metal. The Curie unit of radioactivity is based on radium-226.

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11y ago

Cesium with 36 radio active isotopes

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8y ago

Francium! ) ('.')

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11y ago

polonium

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11y ago

plutonium

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Q: What is the heaviest radioactive element?
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Heaviest element that is highly radioactive?

The heaviest element that is highly radioactive is Ununoctium, which has an atomic number of 118.


What is the heaviest usable metal?

Bismuth (Bi) is the heaviest nonradioactive element but the next heaviest is Lead (Pb) and that is much more commonly used. The heaviest element that is naturally occurring, and also usable, though radioactive, is Uranium (U).


Which is the heaviest radioactive element?

The heaviest natural radioactive element is Uranium.Man made elements are continuously being made. The latest heaviest superheavyweight man made element to be discovered is element 117 (it is still so new that it hasn't been given a name yet).A little different bit of information about Fermium, a team has captured a piece of its spectrum-the wavelengths of light it absorbs-making it the heaviest element ever to be so measured. It was made in the 1952 detonation of the first thermonuclear bomb. It does not make it as the heaviest element, just the heaviest to have it's light spectrum captured.


What is the heavist element in the periodic table?

The heaviest stable element is bismuth, atomic number 83, atomic weight 208.9804). Any heavier element is radioactive, which means it decays into lighter elements - uranium, the heaviest naturally occurring element, will eventually decay into lead-207.


What characterizes a radioactive element?

As radioactive element is an element that is on the Priodic Table of Elements. A Radioactive Element is usually radioactive.


What are three unusual or unique facts about your element uranium?

1. Uranium is the heaviest natural chemical element. 2. Uranium is radioactive 3. Uranium isotope U-235 is fissile


What is the heaviest element found as a liquid?

Mercury is the heaviest element at a liquid state.


What is heaviest element on the periodic table of elements?

The heaviest element in the periodic table (known in March 2013) is ununoctium.


What lists the particles of matter in order from lightest to heaviest?

The lightest gaseous element is hydrogen, with a density around 7% that of air; The heaviest is radon, with a density of around 8.5 times that of air.Radon is radioactive, and relatively short lived; the heaviest stable element is xenon, with a density around 4.5 times that of air.


Is the element sodium radioactive or non-radioactive?

non radioactive element


How do you use radioactive element in a sentence?

A radioactive element is one that discharges radiation. Uranium is a radioactive element. A radioactive element is very dangerous if you don't have protective clothing. You should never go near a radioactive element.


What is the 85th element on the Periodic Table of Elements?

The 85th element on the Periodic Table of Elements is astatine (At). It is a highly radioactive element and the heaviest known halogen. Astatine is rare and is primarily produced as a result of decay processes in uranium ores.