Question
Which of the following factors primarily determines the size of an atom?
Asked in RRB Group D · 2026
Modern Periodic Table · Chemistry
Exam PYQ4 Options
Quick Revision
Atomic radius generally decreases across a period and increases down a group.
Correct AnswerCorrect option for this question
Learn Modern Periodic Table in 60 Seconds
Watch this quick lesson on Modern Periodic Table: Groups, Periods & Blocks to revise the core concept and the facts most useful in competitive exams.
Everything you need to learn, practice & excel — in one place.
3,000+ Video-Based Study Material
PYQ-Based Quizzes
4,000+ Informative Audiobooks
6,300+ Full-Length Mock Tests
Daily Current Affairs
40,000+ PYQs
Questions Asked from Modern Periodic Table: Groups, Periods & Blocks in Previous Exams
See how often Modern Periodic Table: Groups, Periods & Blocks has appeared in previous-year questions across major government exams.
15UPSC Questions Asked in These Years:2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2021, 2022, 2023, 2024, 2026
8SSC Questions Asked in These Years:2017, 2019, 2020, 2021, 2022, 2023, 2024, 2025
6Railways Questions Asked in These Years:2016, 2018, 2021, 2022, 2024, 2025
14State PSC Questions Asked in These Years:2002, 2004, 2012, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
Modern Periodic Table: Groups, Periods & Blocks has appeared in 43 previous-year exam questions, most frequently in UPSC, State PSC and SSC.
2-Minute Revision Notes
Revise Modern Periodic Table and Its Related Concepts
Strengthen key concepts with exam-focused visual notes for faster revision.
Explore More Questions
Continue practising by chapter, topic and related subjects.
One question solved. Keep going.
Continue with the next Classification of Elements and Periodicity in Properties question and build your accuracy one question at a time.