Nuclear Chemistry and Radioactivity — Formula Sheet
Maharashtra Board · Class 11 · Chemistry
8 formulas from Nuclear Chemistry and Radioactivity (Maharashtra Board Class 11 Chemistry) on one page, grouped by topic.
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Formulas and Key Relations
Atomic Nucleus and Nuclear Notation
Nuclear radius R = R₀A^(1/3) where R₀ = 1.33 × 10^-15 m
Classification of Nuclides
Isotones
Same N, different Z and A (e.g., ¹³C and ¹⁴N both have N=7)
Nuclear Stability
N/Z ratio determines stability
N/Z ≈ 1 for light nuclei, N/Z > 1 for heavy nuclei
Nuclear Binding Energy and Mass Defect
Binding energy
Energy equivalent of mass defect (E = mc²)
Key relations
Radioactive decay follows first-order kinetics
Rate = -dN/dt = λN, where λ is decay constant.
The integrated form gives N = N₀e^(-λt).
Einstein's equation E = mc² governs nuclear reactions.
Mass defect Δm = [ZmH + (A-Z)mn] - m represents mass lost during nucleus formation.
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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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