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#atomic radius

9 public questions tagged with this topic.

CHEMISTRY

What is the approximate ratio of the radius of an atom to its nucleus?

Rutherford’s model states the atomic radius is about 10⁻¹⁰m and the nuclear radius is 10⁻¹⁵m, giving a ratio of 10⁻¹⁰/ 10⁻¹⁵= __10POW₅__. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

Ref: NCERT Chemistry Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII)Topic: Mole concept, atomic structure, chemical formulas like H₂O, CO₂, CH₃CH₂NH₂ and periodic trends.

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Modern Periodic Law and Present Form - Long Form Periodic Table

Which pair of elements from the same group shows the greatest increase in atomic radius?

Atomic radius increases down a group, with the largest jump often between early periods. In group 1, Li (period 2) to Na (period 3) shows a significant increase due to the addition of a new shell, compared to later pairs.

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

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Atoms and Molecules

Which of the following atoms has the largest atomic radius?

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.

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