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Calcular o volume de uma célula unitária CFC em termos do raio atômico R.

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O volume de uma célula unitária CFC (Cúbica de Face Centrada) pode ser calculado pela fórmula: V = (4√2 / 3) * R³ Onde R é o raio atômico.

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What is the concept of crystal structure in materials science?
a. The regularity in which atoms or ions are arranged in relation to each other in a solid material.
b. The irregularity in which atoms or ions are arranged in relation to each other in a solid material.
c. The way in which atoms or ions are arranged in relation to each other in a liquid material.

a) The regularity in which atoms or ions are arranged in relation to each other in a solid material.
b) The irregularity in which atoms or ions are arranged in relation to each other in a solid material.
c) The way in which atoms or ions are arranged in relation to each other in a liquid material.

What is the structure of the CFC (cubic face-centered) crystal in metals?

I - The CFC structure has a cubic unit cell with atoms located at each vertex and at the center of all faces of the cube.
II - The CFC structure has a coordination number of 12.
III - The CFC structure has a high atomic packing factor.
a) Only I is correct.
b) Only II is correct.
c) Only III is correct.
d) I and II are correct.
e) I, II, and III are correct.

What is the atomic packing factor for the CFC structure?

I- The atomic packing factor for the CFC structure is 0.74.
II- Metals typically have relatively high atomic packing factors.
III- The coordination number for the CFC structure is 8.
a) Only I is correct.
b) Only II is correct.
c) Only III is correct.
d) I and II are correct.
e) I, II, and III are correct.

Mostrar que o fator de empacotamento atômico para a estrutura cristalina CFC é de 0,74.

O cobre possui um raio atômico de 0,128 nm, uma estrutura cristalina CFC, e um peso atômico de 63,5g/mol. Calcular sua densidade teórica e comparar a resposta com sua densidade medida experimentalmente (8,94g/cm²).


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