Hello

Using the same code structure as

PlanetData[ EntityClass["Planet", "OuterPlanet"], {"Name", "MoonCount"}]`

which works quite well (a list with the values of 2 properties is returned), I would like to make it work with

ElementData[EntityClass["Element", "Radioactive"], {"Name", "HalfLife"}]'

I get an error message although these properties are known.

To bypass it I have to use a much longer code:

l1 = ElementData[EntityClass["Element", "Radioactive"], "Name"];
l2 = ElementData[EntityClass["Element", "Radioactive"], "HalfLife"];
Thread[Join[{l1, l2}]]

Why the much shorter code above does not work?

Thanks