1
Nurodykite, ką atomo branduolio žymėjime $^A_Z X$ nurodo skaičius $Z$.
2
Nurodykite daleles, kurios kartu yra vadinamos nukleonais.
3
Nurodykite dvi daleles, iš kurių sudarytas atomo branduolys ir kurios bendrai vadinamos nukleonais.
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