Key Equations

Sections
Key Equations

Key Equations

energy of hydrogen electron in an orbital E n = 13.6eV n 2 (n=1,2,3,...) E n = 13.6eV n 2 (n=1,2,3,...)
energy of any hydrogen-like electron in orbital E n = Z 2 n 2 E o ( n=1,2,3,... ) E n = Z 2 n 2 E o ( n=1,2,3,... )
wavelength of light emitted by an electron changing states 1 λ =R( 1 n f 2 1 n i 2 ) 1 λ =R( 1 n f 2 1 n i 2 )
wavelength of an orbital n λ n =2π r n ( n=1,2,3,... ) n λ n =2π r n ( n=1,2,3,... )
heisenberg’s uncertainty principle ΔxΔp h 4π ΔxΔp h 4π
alpha decay equation X Z A N Y Z2 A4 N + H 2 4 e X Z A N Y Z2 A4 N + H 2 4 e
beta decay equation X Z A N Y Z+1 A N1 +e+v X Z A N Y Z+1 A N1 +e+v
gamma decay equation X Z A N X N +γ X Z A N X N +γ
radioactive half-life N= N O e λt N= N O e λt
energy–mass conversion E=m c 2 E=m c 2
proton-proton chain 2e− +  4 1  4He + 2 v e + 6γ 2e− +  4 1  4He + 2 v e + 6γ
roentgen equivalent man rem=rad×RBE rem=rad×RBE