alleryWhat happens to atomic size as one moves down a group of the modern periodic table?
AIt first decreases then increases
BIt decreases
CIt stays the same
DIt increases
Answer & Solution
Correct answer: D. It increases
1. Going down a group, a new electron shell is added at each step.
2. This raises the distance between the nucleus and the outermost electrons.
3. So the atomic size increases despite the rising nuclear charge.
4. Rule out B: that is the across-a-period trend, not the down-a-group trend.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 2 "Periodic Classification of Elements", p.34_
Keep practising Unit 1C1: Periodic Trends in Atomic Properties
Browse all Unit 1C1: Periodic Trends in Atomic Properties questions for Maharashtra SSC (Class 10), or explore more Chemistry topics.
Related questions
In which block of the modern periodic table are the nonmetals found?An element has the electronic configuration 2, 8, 2. To which group and period of the modeIn the halogen family (group 17), which member exists as a solid at room temperature?The tendency of a nonmetal atom to accept electrons and form an anion, which increases acrHow does the metallic character of elements change while moving down a group?The tendency of a metal atom to lose its valence electrons and form a cation is called itsAmong the period-2 elements Li, Be, B, C, N, O whose atomic radii are 152, 111, 88, 77, 74In what unit is atomic radius expressed, defined as the distance between the nucleus and t