E = m0C2
1eV = 1.6 × 10-19J
E = hƒ
KE = hƒ - F
U = 1/n2(-13.6 eV)
? = h/mv
n? = 2?r
?x?p = h/4p
l amu = 1.6605 × 10-27 kg
A = A0e>-?t N = N0e>
T1/2 = ln2/?
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