7 public questions tagged with this topic.
Second period elements (Li to F) have only 2s and 2p orbitals, limiting covalency to 4. C (group 14) achieves this (e.g., CH₄), unlike Li, Be, or N.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Nomenclature of Elements with Atomic Number >100
Basic oxides are formed by metals, especially on the left side of the periodic table. K (group 1) forms K₂O, a basic oxide, while C, S, and P form acidic or amphoteric oxides.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Modern Periodic Law and Present Form - Long Form Periodic Table
Electronegativity increases across a period and decreases down a group. Among Li, Be, N, and F, F (group 17, period 2) has the highest electronegativity due to its position on the far right of the periodic table.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Modern Periodic Law and Present Form - Long Form Periodic Table
Neutral oxides do not react with acids or bases. C (group 14) forms CO, a neutral oxide, unlike Na₂O (basic), P₂O₅ (acidic), or Al₂O₃ (amphoteric).
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Electronic Configuration and Types of Elements - s p d f Blocks
Electronegativity decreases down a group. Among C, Si, Ge, and Pb (group 14), C (period 2) has the highest value.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Electron Gain Enthalpy and Electronegativity and Valency
Sodium is the scientifically accurate answer to this question. Within the study of Atoms and Molecules, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Sodium directly address what is being asked. Among the other options, Oxygen, Fluorine, and Carbon do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.
Ref: Campbell Biology, Urry et al., 12th Ed.
Fluorine is the scientifically accurate answer to this question. Within the study of Chemical Bonding, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Fluorine directly address what is being asked. Among the other options, Oxygen, Nitrogen, and Carbon do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.
Ref: Campbell Biology, Urry et al., 12th Ed.
