Structure of Atom
CBSE · Class 11 · Chemistry
All formulas from Structure of Atom in CBSE Class 11 Chemistry. Key equations, constants, and identities for board exam preparation.
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Formulas
1. Discovery of Sub-Atomic Particles
e/m_e = 1.758820 × 10^11 C kg^-1
e = -1.602176 × 10^-19 C
m_e = 9.1094 × 10^-31 kg
2. Atomic Models
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3. Atomic Number, Mass Number, Isotopes and Isobars
Atomic number Z = number of protons = number of electrons in a neutral atom
Mass number A = number of protons + number of neutrons
Number of neutrons = A - Z
4. Electromagnetic Radiation and Planck’s Quantum Theory
c = vλ
E = hν
E = 6.626 × 10^-34 J s × ν
hν = hν0 + (1/2)m_e v^2
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
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