Question

question 10 of 10
which of the following is a characteristic of the actinides?
a. they are all radioactive.
b. they are found abundantly in nature.
c. they do not react with anything.
d. they have a full octet of valence electrons.

Explanation:

Actinides are a series of elements in the periodic table. By definition, all actinides are radioactive. Most actinides are rare in nature (not abundant as in option B). They are reactive (contradicting option C). And they do not have a full octet of valence electrons (eliminating option D).

Answer:

A. They are all radioactive.