¿cual es el valor del numero atómico?

Neutral atoms of an element contain an equal number of protons and electrons. The number of protons determines an element's atomic number (Z) and distinguishes one element from another. For example, carbon's atomic number (Z) is 6 because it has 6 protons.

hope that helps not for sure if you need translated but if you do it is What is the value of the atomic number?

The answer is b because a,c,and d are opinons