Atomic number and mass number
Atomic number = number of protons (= electrons in a neutral atom); mass number = protons + neutrons.
The idea, in English
Atomic number = number of protons (= electrons in a neutral atom); mass number = protons + neutrons.
Explain in Egyptian Arabic
الـ Atomic number = عدد الـ protons (وهو نفسه عدد الـ electrons في الذرة المتعادلة)؛ والـ mass number = protons + neutrons.