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Aluminum metal has a density of 2.72g/cm3 and crystallizes in lattice with an edge length of 404 pm. Which of the following alternative are correct:
- a)It forms a base centered cubic unit cell
- b)It forms a face centered cubic unit cell
- c)Its coordination number is 8
- d)its coordination number is 6
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Aluminum metal has a density of 2.72g/cm3 and crystallizes in lattice ...
Explanation:
1. Density of aluminum metal:
The given density of aluminum metal is 2.72 g/cm3. This means that for every cubic centimeter of aluminum, it has a mass of 2.72 grams.
2. Lattice with an edge length of 404 pm:
The lattice refers to the arrangement of atoms in a crystal structure. The edge length of 404 pm (picometers) represents the distance between the centers of two adjacent atoms in the crystal structure.
3. Determining the unit cell:
To determine the unit cell of aluminum, we need to consider the arrangement of atoms in the crystal lattice. There are three common types of unit cells: simple cubic (SC), body-centered cubic (BCC), and face-centered cubic (FCC).
4. Coordination number:
The coordination number refers to the number of atoms or ions that surround a central atom or ion in a crystal lattice. It represents the number of nearest neighbors of an atom.
5. Analyzing the options:
a) Base-centered cubic unit cell: This type of unit cell has additional atoms located at the center of each face of the cube. The coordination number for base-centered cubic is 8. However, aluminum does not crystallize in a base-centered cubic structure.
b) Face-centered cubic unit cell: This type of unit cell has additional atoms located at the center of each face of the cube. The coordination number for face-centered cubic is 12. Aluminum metal crystallizes in a face-centered cubic structure, where each aluminum atom is surrounded by 12 neighboring aluminum atoms.
c) Coordination number of 8: This coordination number is associated with a cubic close-packed (CCP) or face-centered cubic (FCC) structure, where each atom is surrounded by 12 nearest neighbors. The coordination number of aluminum is 12, not 8.
d) Coordination number of 6: This coordination number is associated with a hexagonal close-packed (HCP) structure, where each atom is surrounded by 6 nearest neighbors. The coordination number of aluminum is 12, not 6.
6. Conclusion:
Based on the information provided, the correct option is b) It forms a face-centered cubic unit cell.
1. Density of aluminum metal:
The given density of aluminum metal is 2.72 g/cm3. This means that for every cubic centimeter of aluminum, it has a mass of 2.72 grams.
2. Lattice with an edge length of 404 pm:
The lattice refers to the arrangement of atoms in a crystal structure. The edge length of 404 pm (picometers) represents the distance between the centers of two adjacent atoms in the crystal structure.
3. Determining the unit cell:
To determine the unit cell of aluminum, we need to consider the arrangement of atoms in the crystal lattice. There are three common types of unit cells: simple cubic (SC), body-centered cubic (BCC), and face-centered cubic (FCC).
4. Coordination number:
The coordination number refers to the number of atoms or ions that surround a central atom or ion in a crystal lattice. It represents the number of nearest neighbors of an atom.
5. Analyzing the options:
a) Base-centered cubic unit cell: This type of unit cell has additional atoms located at the center of each face of the cube. The coordination number for base-centered cubic is 8. However, aluminum does not crystallize in a base-centered cubic structure.
b) Face-centered cubic unit cell: This type of unit cell has additional atoms located at the center of each face of the cube. The coordination number for face-centered cubic is 12. Aluminum metal crystallizes in a face-centered cubic structure, where each aluminum atom is surrounded by 12 neighboring aluminum atoms.
c) Coordination number of 8: This coordination number is associated with a cubic close-packed (CCP) or face-centered cubic (FCC) structure, where each atom is surrounded by 12 nearest neighbors. The coordination number of aluminum is 12, not 8.
d) Coordination number of 6: This coordination number is associated with a hexagonal close-packed (HCP) structure, where each atom is surrounded by 6 nearest neighbors. The coordination number of aluminum is 12, not 6.
6. Conclusion:
Based on the information provided, the correct option is b) It forms a face-centered cubic unit cell.
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Aluminum metal has a density of 2.72g/cm3 and crystallizes in lattice with an edge length of 404 pm. Which of the following alternative are correct:a)It forms a base centered cubic unit cellb)It forms a face centered cubic unit cellc)Its coordination number is 8d)its coordination number is 6Correct answer is option 'B'. Can you explain this answer?
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Aluminum metal has a density of 2.72g/cm3 and crystallizes in lattice with an edge length of 404 pm. Which of the following alternative are correct:a)It forms a base centered cubic unit cellb)It forms a face centered cubic unit cellc)Its coordination number is 8d)its coordination number is 6Correct answer is option 'B'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Aluminum metal has a density of 2.72g/cm3 and crystallizes in lattice with an edge length of 404 pm. Which of the following alternative are correct:a)It forms a base centered cubic unit cellb)It forms a face centered cubic unit cellc)Its coordination number is 8d)its coordination number is 6Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Aluminum metal has a density of 2.72g/cm3 and crystallizes in lattice with an edge length of 404 pm. Which of the following alternative are correct:a)It forms a base centered cubic unit cellb)It forms a face centered cubic unit cellc)Its coordination number is 8d)its coordination number is 6Correct answer is option 'B'. Can you explain this answer?.
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