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Elements with no stable isotopes include technetium (element 43) and promethium (element 61) and all elements heavier than lead (elements 83 and higher). Bismuth, element 83, is virtually stable with an extremely long half life of 1.9 x 1019 years.

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10y ago
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14y ago

Francium is the only alkaline earth metal which has no stable isotopes.

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12y ago

Technetium (Tc) and Promethium (Pm) does not have any stable isotopes yet

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14y ago

oxygen

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Q: Which alkali metal element has no stable isotopes?
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Related questions

Is americium a radioactive metal?

Yes, americium is a radioactive metal. This element has no stable isotopes.


Does neon react vigorously with alkali metals to form salts?

No, cesium is an alkali metal. Metals do not react with one another. Cesium reacts with nonmetals and acids to form salts.


What is the element the only stable isotope of a particular alkali metal that has 78 neutrons?

Ba and Cs


What is the alkali metal sodium?

The alkali metal, sodium, is an element.


Can radium be manufactured artificially?

Radium is a natural chemical element, an alkali earth metal; but some isotopes of radium can be obtained artificially.


The first element in a period is always an active?

The first element in a period is an alkali metal.


Is lithium a metal element or nonmetal?

Lithium is an alkali metal.


Is sodium the most stable alkali metal?

No...


What element of group 1 is not known as an alkali metal?

Hydrogen is in group 1 but is not an alkali metal.


Is sodium a transition element?

Sodium is an Alkali metal. Elements in the center of the periodic table are transition metals.


Is the element Ca an alkali metal?

No- it is an alkaline earth metal.


What element is a radioactive alkali metal?

Francium