The most common isotope of aluminum is Aluminum-27, which has an atomic number of 13 (indicating it has 13 protons). To find the number of neutrons, subtract the atomic number from the mass number:
Number of neutrons = Mass number - Atomic number
Number of neutrons = 27 - 13 = 14
For the model, the color coding is typically represented in a specific way (for example, protons might be a certain color, neutrons another, and so forth). Given that the most common isotope of aluminum has 13 protons (which would usually be represented by orange beads) and 14 neutrons (which may be represented by another color, possibly blue), we must choose a combination that fits this representation.
Assuming:
- Protons are represented by orange beads,
- Neutrons are represented by green beads (or blue or however it's defined),
Since there are 13 protons and 14 neutrons, the best explanation in terms of bead combinations based on your options would likely require identifying which has the correct numbers corresponding to these quantities, but it makes sense based on atomic structure.
However, without specific colors assigned to neutrons in your question, it's difficult to directly ascertain the correct answer just based off the options provided and colors assigned.
The information from the options gives an insight into which might fit, but with ambiguity in colors, guessing is necessary:
If we assume:
- Orange = Protons (13),
- Green = Neutrons (14, then you need to have whatever color for neutrons at 14, implying the total number of blue might be different).
Based on your combinations, none perfectly fit to hold 14 neutrons and still fitting the proton need:
- 1 orange = 1 proton (incorrect)
- 2 orange correlating might imply the wrong interpretation.
Would you like to provide what's assigned for neutrons in color terms for further verification, or based strictly on the typical understanding of needing 14 neutrons, none might fit?