To create a model of a cobalt atom with a mass number of 59 and an atomic number of 27, we need to understand a few key concepts:
- The atomic number (27) represents the number of protons in the nucleus of the atom.
- The mass number (59) is the total number of protons and neutrons in the nucleus.
From this information, we can calculate the number of neutrons:
\[ \text{Number of neutrons} = \text{Mass number} - \text{Atomic number} = 59 - 27 = 32. \]
Therefore, a cobalt atom has:
- 27 protons
- 32 neutrons
The correct statement about the model is:
The model should show 27 protons and 32 neutrons.