Which statement describes the properties of lanthanoids and actinoids?

Question

(1 point)
They are brittle and dull, and they tend to conduct both electricity and thermal
energy.
They are brittle and dull, and they tend to be poor conductors of both electricity
and thermal energy.
They are malleable and lustrous, and they tend to be poor conductors of both
electricity and thermal energy.
They are malleable and lustrous, and they tend to conduct both electricity and
thermal energy.

Answer 1

The correct statement that describes the properties of lanthanoids and actinoids is:

They are brittle and dull, and they tend to conduct both electricity and thermal energy.

Lanthanoids and actinoids are generally characterized by their brittleness and dull appearance. Furthermore, they can conduct electricity and thermal energy, although specific behaviors may vary among the different elements in these groups.