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Radium. Elements with an atomic number greater than 83 are always radioactive.

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Q: Which alkaline earth metal is radioactive?
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Related questions

Which alkaline earth metals are radioactive?

Radium is the radioactive metal among alkaline earth metals.


What alkaline earth metal is radioactive?

Radium.


What is radiums chemical state?

Radium is an alkaline earth metal, radioactive, solid, reactive.


What class is radium in?

Radium is an alkaline earth metal, group 2, period 7; Ra is a radioactive.


Radioactive element used to treat cancer and is also a alkaline earth metal?

I believe the answer is cobalt (Co).


What element is an alkaline earth metal is very toxic?

Radium is element number 88 with the symbol Ra. Radium is an alkaline earth metal in group 2 of the periodic table. Radium is radioactive and very toxic.


What kind of metal is radium?

Yes. Radium is actually considered an alkaline earth metal. Its colour is nearly pure white, but when exposed to air, it turns black. Radium is also extremely radioactive. A link is provided to the Wikipedia article on radium.


Is beryllium a alkaline metal?

It is an alkaline earth metal.


Is beryllium alkali metal or alkaline earth metal?

It is an alkaline earth element


Is krypton a alkaline earth metal?

It is not an alkaline earth metal it is a noble gas


Is Krypton a alkaline-earth metal?

It is not an alkaline earth metal it is a noble gas


What is the family name that calcium is in?

Group 2 (alkaline earth metals): lithium, sodium, potassium, caesium, rubidium, francium.