Atoms make the element and comprise sub-atomic particles. The neutrons and protons are in middle surrounded by electrons in the shell. Thus, option a is correct.
The sub-atomic particles are a basic and indivisible unit of an atom that includes the protons and neutrons in the middle of the atom in the nucleus. The proton will have a positive and the neutron will have a neutral charge.
The electrons are in the shells of the atom and are said to have a negative charge. The two protons and four neutrons will be in the middle of the atom and surrounded by the two electrons in the shell.
Therefore, option a. best represents Cora's model.
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Answer:
the second model
Explanation:
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