Elements of Groups 16, 17 and 18
Maharashtra Board · Class 12 · Chemistry
Flashcards for Elements of Groups 16, 17 and 18 — Maharashtra Board Class 12 Chemistry. Quick Q&A cards covering key concepts, definitions, and formulas.
Interactive on Super Tutor
Studying Elements of Groups 16, 17 and 18? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for flashcards and more.
1,000+ Class 12 students started this chapter today
What is the general electronic configuration of Group 16 elements and what are they called?
Answer
General electronic configuration: ns²np⁴ Group 16 elements are called chalcogens or ore-forming elements. Members: O, S, Se, Te, Po They need 2 electrons to achieve noble gas configuration.
What is the general electronic configuration of Group 17 elements and what are they called?
Answer
General electronic configuration: ns²np⁵ Group 17 elements are called halogens (salt producers). Members: F, Cl, Br, I, At They need 1 electron to achieve noble gas configuration. Halogens have the sm…
List the oxidation states shown by Group 16 elements and explain the trend.
Answer
Oxygen: -2, -1, +2 (limited due to high electronegativity) Other elements (S, Se, Te, Po): -2, +2, +4, +6 Trend: Stability of +6 decreases down the group while +4 increases due to inert pair effect.
What are the oxidation states of Group 17 elements and why does fluorine show limited oxidation states?
Answer
All halogens: -1 Cl, Br, I also show: +1, +3, +5, +7 Fluorine only shows -1 because: 1. Highest electronegativity 2. No d-orbitals in valence shell 3. Cannot expand octet 4. Small atomic size…
Explain the anomalous behavior of oxygen compared to other Group 16 elements.
Answer
1. Atomicity: O₂ (diatomic) vs S₈ (polyatomic) 2. Magnetic property: O₂ is paramagnetic, others diamagnetic 3. Oxidation states: Limited to -2, -1, +2 4. Hydride: H₂O is liquid (hydrogen bonding), oth…
Why does fluorine show anomalous behavior in Group 17?
Answer
Reasons: 1. Small atomic size 2. Highest electronegativity (4.0) 3. No d-orbitals in valence shell 4. Low F-F bond dissociation enthalpy Consequences: - Forms only one oxoacid (HOF) - HF is liquid du…
Write the balanced equation for laboratory preparation of oxygen from KClO₃ and state the conditions.
Answer
2KClO₃(s) → MnO₂/Heat → 2KCl(s) + 3O₂(g) Conditions: - Catalyst: MnO₂ (manganese dioxide) - Temperature: Heat required - Alternative catalysts: Iron oxide, copper oxide Other methods: 2H₂O₂(aq) → Mn…
Describe the structure and properties of ozone (O₃).
Answer
Structure: - Angular molecule with bond angle 117° - Two identical O-O bonds (128 pm) - Resonance hybrid of two canonical forms Properties: - Pale blue gas, dark blue liquid - Diamagnetic - Powerful …
+17 more flashcards available
Practice AllFrequently Asked Questions
What are the important topics in Elements of Groups 16, 17 and 18 for Maharashtra Board Class 12 Chemistry?
How to score full marks in Elements of Groups 16, 17 and 18 — Maharashtra Board Class 12 Chemistry?
How many flashcards are available for Elements of Groups 16, 17 and 18?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Elements of Groups 16, 17 and 18
Important Questions
Practice with board exam-style questions
Syllabus
What topics to cover
Revision Notes
Key points for last-minute revision
Study Plan
Step-by-step plan to ace this chapter
Formula Sheet
All formulas in one place
Chapter Summary
Understand the chapter at a glance
Practice Quiz
Test yourself with a quick quiz
Concept Maps
See how topics connect visually
NCERT Solutions
Every textbook question solved step by step
For serious students
Get the full Elements of Groups 16, 17 and 18 chapter — for free.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for Maharashtra Board Class 12 Chemistry.