susunan atom tolong yaaaa

23Na11
nomor atom = proton = 11
jika masih dlm bentuk atom elektron = proton = 11
nomor massa = 23
neutron = nomor massa - proton = 23-11 = 12

35Cl17
nomor atom = proton = 17
elektron = 17
nomor massa 35
nutron = 35 - 17 = 18