The atomic number of sodium is 11 and its mass number is 23. It has

Question

$\begin{array}{1 1}\text{a .11 neutrons and 12 protons} \\ \text{b. 12 protons and 11 electrons } \\ \text{ c. 11 electrons and 12 neutrons } \\ \text{ d. 12 electrons and 11 neutrons} \end{array}$