Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET 2007
Exam
NEET
Year
2007
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

NEET 2007 · Chemistry · Classification of Elements and Periodicity in Properties

With which of the following electronic configuration an atom has...

With which of the following electronic configuration an atom has the lowest ionisation enthalpy?

Options

  1. A1s22s22p31 s^2 2 s^2 2 p^3
  2. B1s22s22p63s11 s^2 2 s^2 2 p^6 3 s^1
  3. C1s22s22p61 s^2 2 s^2 2 p^6
  4. D1s22s22p51 s^2 2 s^2 2 p^5

Correct answer

B. 1s22s22p63s11 s^2 2 s^2 2 p^6 3 s^1

Step-by-step solution

The factors on which the ionisation energy depend is atomic size. I.E. decreases as the atomic size increases. So the attractive force decreases. Also as the number of shells increases screening effect also increases and hence the I.E. tends to decrease. Related Theory The more electron shells there are, the greater the shielding effect experienced by the outermost electrons. As a result, atoms will be larger.
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