1) How many isotopes of oxygen? a) 1 b) 5 c) 7 d) 3 e) 9 f) 8 2) Isotopes have the same …. a) nucleus b) atomic mass c) atomic number d) Nobil gas e) atomic number and mass f) non of them

Lestvica vodilnih

Vizualni slog

Možnosti

Preklopi predlogo

Obnovi samodejno shranjeno: ?