Which statement describes the properties of lanthanoids and actinoids/

Question

They are brittle and dull, and they tend to condduct both electricity and thermal energy
They are malleable and lustrous, and they tend to conduct both electricity and thermal energy
They are malleable and lustrous, and they tend to be poor conductors of both electricty and thermal energy
They are brittle and dull, and they tend to be poor conductors of 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 typically characterized by their brittleness and a generally dull appearance, and while they can conduct electricity and heat, their thermal and electrical conductivities can vary among the different elements in these series.