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.
Francium is the only alkaline earth metal which has no stable isotopes.
Technetium (Tc) and Promethium (Pm) does not have any stable isotopes yet
oxygen
Yes, americium is a radioactive metal. This element has no stable isotopes.
No, cesium is an alkali metal. Metals do not react with one another. Cesium reacts with nonmetals and acids to form salts.
Radium is a natural chemical element, an alkali earth metal; but some isotopes of radium can be obtained artificially.
No- it is an alkaline earth metal.
Francium
Yes, americium is a radioactive metal. This element has no stable isotopes.
No, cesium is an alkali metal. Metals do not react with one another. Cesium reacts with nonmetals and acids to form salts.
Ba and Cs
The alkali metal, sodium, is an element.
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 an alkali metal.
Lithium is an alkali metal.
No...
Hydrogen is in group 1 but is not an alkali metal.
Sodium is an Alkali metal. Elements in the center of the periodic table are transition metals.
No- it is an alkaline earth metal.
Francium