Practice Mode•Instant Explanations & 50:50 Enabled
Chemical Bonding Periodic Table MCQs
High-yield multiple choice questions asked in previous years (UPSC, SSC CGL, JKSSB, RRB & State PSCs).
High-Yield Concept Capsule & Key Facts
📌 Standard scoring chemistry module in SSC CGL/CHSL, UPSC CSE, CDS, NDA, and State PSCs.
Modern Periodic Table & Periodic Trends
- • Modern Periodic Law: Formulated by Henry Moseley (1913) stating that 'the physical and chemical properties of elements are periodic functions of their atomic numbers (Z)' (Dmitri Mendeleev used atomic weights).
- • Periodic Table Structure: 7 horizontal Periods and 18 vertical Groups. Blocks: s-block (Groups 1-2), p-block (Groups 13-18), d-block (transition metals, Groups 3-12), f-block (inner transition metals - Lanthanides & Actinides).
- • Periodic Trends across a Period (Left to Right): Atomic radius decreases; Electronegativity increases (Fluorine is highest, 4.0 on Pauling scale); Ionization Energy increases; Metallic character decreases.
- • Periodic Trends down a Group (Top to Bottom): Atomic radius increases (new electron shells added); Electronegativity decreases; Metallic character increases; Ionization energy decreases.
Chemical Bonding & Molecular Structures
- • Ionic (Electrovalent) Bond: Complete transfer of valence electrons from metal to non-metal (e.g. NaCl, MgO). High melting/boiling points, conduct electricity in molten/aqueous state.
- • Covalent Bond: Mutual sharing of electron pairs between non-metals (e.g. H2O, CH4, CO2). Low melting points, poor conductors.
- • Coordinate (Dative) Bond: Special covalent bond where both shared electrons originate from a single donor atom (e.g. NH4+, H3O+).
- • Hydrogen Bonding: Electrostatic attraction between hydrogen covalently bound to highly electronegative atoms (F, O, N). Explains anomalously high boiling point of water and density anomaly of ice.
| Periodic Property | Across a Period (Left to Right) | Down a Group (Top to Bottom) | Element with Highest Value |
|---|---|---|---|
| Atomic Radius | Decreases (higher nuclear charge) | Increases (shells added) | Francium (Fr) / Cesium (Cs) |
| Electronegativity | Increases | Decreases | Fluorine (F, 4.0) |
| Ionization Energy | Increases | Decreases | Helium (He) |
| Electron Affinity | Increases | Decreases | Chlorine (Cl) |
| Metallic Character | Decreases (Metals -> Nonmetals) | Increases | Cesium (Cs) |
Showing 15 Practice Questions
Q1SSC CGL 2023Easy
The Modern Periodic Table is arranged in increasing order of which fundamental physical property?
Q2UPSC CSE PrelimsEasy
Which of the following elements has the HIGHEST electronegativity on the Pauling scale?
Q3JKSSB FAA 2022Easy
What type of chemical bond involves the complete electrostatic transfer of one or more valence electrons from a metal to a non-metal atom?
Sponsored Advertisement
Ad Space • Google AdSense Partner Network
Q4CDS 2022Easy
How many total vertical Groups and horizontal Periods are present in the modern long form of the Periodic Table?
Q5JKSSB VLW 2023Easy
The anomalously high boiling point of liquid water (100°C) compared to hydrogen sulfide (H2S, -60°C) is explained by:
Q6SSC CGL Tier-1Easy
Moving from left to right across a period in the periodic table, the atomic radius of elements generally:
Q7JKPSC KAS PrelimsEasy
The inert gases or Noble Gases (Helium, Neon, Argon, Krypton, Xenon, Radon) occupy which group of the periodic table?
Q8NDA 2022Medium
Which element has the highest electron gain enthalpy (electron affinity) in the periodic table?
Q9SSC CHSLEasy
The chemical bond present inside a molecule of methane (CH4) is classified as:
Q10JKSSB Sub-InspectorEasy
Elements in the d-block of the periodic table (Groups 3 to 12) are commonly referred to as:
Q11UPSC CSE PrelimsMedium
Which of the following compounds exhibits both ionic and covalent bonding within its crystal structure?
Q12JKSSB Patwari 2024Hard
The diagonal relationship in the periodic table (similarities between Li-Mg, Be-Al, B-Si) is primarily due to their similar:
Q13CDS 2021Easy
Which element is the most abundant chemical element by mass in the Earth's crust?
Q14SSC CGLMedium
What is the geometry and bond angle of a water (H2O) molecule according to VSEPR theory?
Q15JKSSB Junior AssistantEasy
Which halogen is a liquid at room temperature (25°C)?
Frequently Asked Questions (Chemical Bonding Periodic Table)
Q: What is the Modern Periodic Law and who formulated it?
The Modern Periodic Law was formulated by British physicist Henry Moseley in 1913. It establishes that the physical and chemical properties of chemical elements are periodic functions of their atomic numbers (the number of protons in the nucleus), rectifying discrepancies in Mendeleev's atomic mass arrangement.
Q: Which chemical element possesses the highest electronegativity on the Pauling scale?
Fluorine (F) is the most electronegative element in the entire periodic table, possessing an assigned electronegativity value of 4.0 on the Pauling scale.
Q: Why does ice float on liquid water?
Due to intermolecular hydrogen bonding, water molecules in ice arrange into an open, cage-like hexagonal crystalline lattice. This open structure traps empty space, making ice approximately 9% less dense than liquid water, allowing it to float.
Explore More General Science Topics
Ready to test your speed under real exam conditions?
Attempt timed full-length CBT tests with negative marking and percentile analysis.