Question

Which complete group of elements was the most recent to be

O A. noble gases
OB. halogens
O C. alkali metals
O D. transition metals

Answer 1

The most recent group of elements to be discovered is the noble gases.

Step-by-step explanation:

The most recent group of elements to be discovered is the noble gases. Noble gases are a group of elements that are the least reactive and have full outer electron shells, making them stable. They were discovered in the late 19th and early 20th centuries and include elements like helium, neon, argon, krypton, and xenon.

Learn more about Discovery of noble gases