Cora's model of the atom has two protons, four neutrons, and two electrons.
In terms of the models described:
- Protons are represented by blue balls marked with plus signs.
- Neutrons are represented by unmarked red balls.
- Electrons are represented by small green balls marked with minus signs.
Let's analyze each model option:
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Option 1: At the center, there are 2 unmarked red balls (2 neutrons) interspersed with 4 blue balls marked with plus signs (4 protons). This does not match Cora's model since she needs 2 protons.
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Option 2: At the center, there are 4 unmarked red balls (4 neutrons) interspersed with 2 blue balls marked with plus signs (2 protons). This does not match because there are too many neutrons.
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Option 3: At the center, there are 2 unmarked red balls (2 neutrons) and 2 blue balls marked with plus signs (2 protons). This matches the protons but does not match the number of neutrons because it also mistakenly states 2 neutrons (where it should say 4).
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Option 4: At the center, there are 4 unmarked red balls (4 neutrons) interspersed with 2 blue balls marked with plus signs (2 protons). Surrounding this, there are 4 small green balls marked with minus signs (4 electrons). This does not match because there are too many electrons.
The closest correct model based on the information provided is Option 1 because it correctly shows 2 neutrons and 2 protons, but it incorrectly includes too many protons in total.
Cora needs to find a model that clearly shows 2 protons, 4 neutrons, and 2 electrons. Unfortunately, none of the options given perfectly represent her atom, but Option 1 matches the number of neutrons and forwardly shows 2 of each proton.
1 answer