суграшица създание обезверяване atomic symbol суша фабрика пробивам
Atomic notation X A Z X = Symbol (C, Au) A = Atomic Mass Number = #nucleons (Protons + Neutrons) Z = Atomic Number = #protons C 12 6 Carbon A = 12, Z = - ppt download
Atomic Symbols - YouTube
Atomic Symbols
Dalton's list of atomic and molecular symbols - Stock Image - V600/0027 - Science Photo Library