Cobalt has a mass number of 59 and an atomic number of 27. A student wants to

Question

create a model of a cobalt atom. Which statement about the model is correct?

Answer 1

In a model of a cobalt atom with a mass number of 59 and an atomic number of 27, the following statement is correct:

A cobalt atom has 27 protons and, given that the mass number is the sum of protons and neutrons, it must also have 32 neutrons (59 - 27 = 32). The number of electrons in a neutral cobalt atom will also be 27, which balances the positive charge of the protons.

Therefore, the correct points to include in the model would be:

1. There are 27 protons in the nucleus.
2. There are 32 neutrons in the nucleus.
3. There are 27 electrons surrounding the nucleus, typically arranged in energy levels according to the electron configuration.

If the question is looking for additional aspects, please provide further context around the statements being evaluated.