WBCS.LIVE practice question

In the modern periodic table. There are inconsistencies regarding the position of ___________ as it can be placed in the first group of the first period and the 17th group.

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. H
  2. Li
  3. Be
  4. He

Correct answer and explanation

Correct answer: H