Final answer:
The lanthanide series includes elements with atomic numbers 57-71, while the actinide series includes elements with atomic numbers 89-103.
Step-by-step explanation:
The lanthanide series includes the elements lanthanum (La) through lutetium (Lu), with atomic numbers 57-71. These elements are part of the f-block and have similar chemical properties.
The actinide series includes the elements actinium (Ac) through lawrencium (Lr), with atomic numbers 89-103. Like the lanthanides, these elements are also part of the f-block and have similar chemical properties.