Question

question 4
what element is the in the list of actinoids?
o a helium
o b uranium
o c lanthinium
o d hydrogen

Explanation:

Actinoids are a series of radioactive elements starting from actinium (\(Ac\)) in the periodic table. Uranium (\(U\)) is one of the actinoid elements. Helium (\(He\)) is a noble gas in the first period. Lanthanium (\(La\)) is a lanthanoid. Hydrogen (\(H\)) is a non - metal in the first group.

Answer:

B. Uranium