Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q30 (CAPF/2021) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Periodic table elements Answer Verified

Which one of the following properties decreases across the periodic table from left to right and increases from top to bottom?

Result
Your answer: —  Â·  Correct: D
Explanation

Atomic radius is the distance from the nucleus to the outermost electron shell. Across a period from left to right, the atomic radius decreases because the effective nuclear charge increases while electron shielding remains relatively constant, pulling the electron cloud closer to the nucleus. Conversely, the atomic radius increases from top to bottom down a group because new energy levels (electron shells) are added, increasing the distance between the nucleus and valence electrons. Other properties like ionization energy, electron affinity, and electronegativity generally follow the opposite pattern: they increase from left to right across a period due to stronger nuclear attraction and decrease from top to bottom down a group as electrons are further from the nucleus and more shielded.

How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
100%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

IAS · 2003 · Q105 Relevance score: 3.97

Assertion (A) : In the periodic table of chemical elements, electron affinity is always found to increase from top to bottom in a group. Reason (R) : In a group, the atomic radial generally increase from top to bottom.

IAS · 2001 · Q121 Relevance score: 1.14

Consider the following statements with reference to the Periodic Table of chemical elements : I. lonisation potential gradually decreases along a period. II. In a group of elements, electron affinity decreases as the atomic weight increases. III. In a given period, electronegativity decreases as the atomic number increases. Which of these statement(s) is/are correct ?

CDS-II · 2010 · Q45 Relevance score: -1.57

Which one of the following is not a periodic property i.e. does not show any trend on moving from one side to the Other in the periodic table ?

CDS-I · 2015 · Q35 Relevance score: -2.05

An object is raised to a height of 3 m from the ground. It is then allowed to fall on to a table 1 m high from ground level. In this context, which one among the following statements is correct ?

CDS-II · 2008 · Q8 Relevance score: -2.56

Which one of the following properties changes with valency