Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET
Exam
NEET
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

NEET · Chemistry · Classification of Elements and Periodicity in Properties

Why is helium positioned in the p-block of the Periodic Table?

Why is helium positioned in the p-block of the Periodic Table?

Options

  1. ABecause it has a completely filled valence shell
  2. BBecause it has a high atomic number
  3. CBecause it belongs to the alkali metals
  4. DBecause it has a half-filled valence shell

Correct answer

A. Because it has a completely filled valence shell

Step-by-step solution

Strictly, helium belongs to the s-block but its positioning in the p-block along with other group 18 elements is justified because it has a completely filled valence shell (1s2) and as a result, exhibits properties characteristic of other noble gases.
Practice Classification of Elements and Periodicity in Properties on Quantrex Academy →

More from Classification of Elements and Periodicity in Properties

Match the following List I List II A. Technetium I. Non-metal B. Fluorine II. Transition… MHT CET Medical 2026Which of the following properties increases from fluorine to iodine in group? MHT CET Medical 2026Identify the metalloid element from the following. MHT CET Medical 2026Which among the following elements does NOT exhibit -2 oxidation state? MHT CET Medical 2026Which has the maximum electropositive character? MHT CET Medical 2026The hydride with lowest acid strength among the following is MHT CET Medical 2026Among the following options, the correct trend in the electron gain enthalpy is NEET 2026Given below are two statements : One is labelled as Assertion A and the other is labelled… NEET 2026 Full Classification of Elements and Periodicity in Properties list All NEET PYQs