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FISIKA ATOM• struktur atom
₁₉³⁹K
z = 19
A = 39
a][ Nomor atom z = 19
b][ Jika atom netral
jumlah proton = jumlah elektron = 19
c][ Jumlah neutron dalam inti
n = A - z
n = 39 - 19 = 20
d][ Nomor massa A = 39
Pernyataan yang TIDAK BENAR (d). ✓