Modern Periodic Table
Maharashtra Board · Class 11 · Chemistry
Most important questions from Modern Periodic Table for Maharashtra Board Class 11 Chemistry board exam 2026. MCQs, short answer, and long answer questions with marks.
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Sample Questions
Which of the following elements belong to the s-block?
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Lithium (Li), Magnesium (Mg), Sodium (Na)
s-block elements include groups 1 and 2, where the last electron enters the s-orbital. Li, Mg, and Na belong to groups 1 and 2.
As we move across a period from left to right, atomic radius:
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Decreases
Atomic radius decreases across a period due to increasing effective nuclear charge, which pulls electrons closer to the nucleus.
Which of the following properties increase down a group?
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Atomic radius, Metallic character, Number of electron shells
Down a group, atomic radius, metallic character, and number of electron shells increase due to addition of new shells and decreased effective nuclear charge.
The general electronic configuration of Group 17 elements is:
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ns² np⁵
Group 17 elements (halogens) have the general electronic configuration ns² np⁵, with 7 valence electrons.
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