how many formulas are there in chapter structure of atom of chemistry
Following are the formulae in the chapter Structure of atom
1) mass number (A) = number of protons (Z) + number of neutrons (n)
2) c = νλ
where c is the speed of light, ν is the frequency and λ is the wavelength.
3) E = nhν
where E is the energy of photons, n is the number of photons, h is the Planck's constant and ν is the frequency.
4) hν = hν0 + (1/2) mev2
where h is the Planck's constant, ν is the frequency of incident photon (s), ν0 is the threshold frequency, me is the mass of the electron and v is the velocity with which the electron is emitted.
5)
where 
is the wave number, n1 and n2 are positive integers and 109,677 is called Rydberg constant for hydrogen (RH)
6) 
where ν = Frequency of absorbed or emitted radiation
h is the Planck's constant and E1 and E2 are the energies of lower and higher allowed energy states respectively.
7) Angular momentum (L) of an electron in a stationary state is given by,
where me is the mass of the electron
8) Energy (En) of the stationary state is given by,
RH is called Rydberg constant (= 2.18 × 10−18 J) and n is a positive integer.
9) Energies and radii of the stationary states for hydrogen-like species is given by,
pm = 
nm;
where Z is the atomic number
10) Energy difference between two stationary states is given by,
11) De Broglie gave the relationship between wavelength (λ) and momentum (p) of a material particle.
Where, m is the mass of the particle and v is its velocity
12) Heisenberg’s Uncertainty Principle
Δx× Δpx ≥ 
Or, Δx× Δ(mvx) ≥
Or, Δx× Δvx ≥ 
Where,
Δxis the uncertainty in position
Δvxis the uncertainty in velocity
Δpxis the uncertainty in momentum