What is the atomic number of Lawrencium, a chemical element that is classified as the last member of the actinides?

Question

Question

This question was previously asked in

SSC GD Constable 2025 Official Paper (Held On: 04 Feb, 2025 Shift 2)

Answer 1

The correct answer is option 2.

Key Points

Lawrencium is a chemical element with the symbol Lr and atomic number 103.
It is classified as the last member of the actinide series.
Lawrencium was first synthesized in 1961 by the Lawrence Berkeley National Laboratory.
It is a synthetic element, which means it is not found naturally and must be created in a laboratory.

Additional Information

The actinides are a series of 15 metallic elements from actinium (Ac) to lawrencium (Lr) in the periodic table.
Lawrencium's most stable isotope is Lr-262, which has a half-life of about 3.6 hours.
The element is named after Ernest Lawrence, the inventor of the cyclotron, a type of particle accelerator.
As a synthetic element, lawrencium is primarily used for research purposes and has no significant commercial applications.
Lawrencium, like other actinides, exhibits radioactive properties and must be handled with special precautions in a laboratory setting.