Question
Match the elements in Group I with their corresponding crystal structures in Group II. Group I Group II P. Tungsten 1. HCP Q. Nickel 2. Simple cubic R. Magnesium 3. BCC S. Polonium 4. FCC
The correct answer is
P-3, Q-4, R-1, S-2
Crystal Structure Matching Solution
This question requires matching elements from Group I (Tungsten, Nickel, Magnesium, Polonium) with their corresponding crystal structures from Group II (HCP, Simple cubic, BCC, FCC).
Element Crystal Structure Identification
The correct pairings are established as follows:
- P. Tungsten has a BCC (Body-Centered Cubic) crystal structure.
- Q. Nickel possesses an FCC (Face-Centered Cubic) crystal structure.
- R. Magnesium exhibits an HCP (Hexagonal Close-Packed) crystal structure.
- S. Polonium is known for its Simple cubic crystal structure.
Matching Summary
| Group I Element | Group II Structure |
|---|---|
| P. Tungsten | 3. BCC |
| Q. Nickel | 4. FCC |
| R. Magnesium | 1. HCP |
| S. Polonium | 2. Simple cubic |
Therefore, the correct match is P-3, Q-4, R-1, S-2.
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Important Questions from Crystal Structure Density Atomic Packing Factor
- Match the crystal systems in Column I with the corresponding axial lengths (a, b, c) and interaxial angles ($\alpha$, $\beta$, $\gamma$) provided in Column II
Column I Column II (P) Tetragonal (1) $a \neq b \neq c$, $\alpha = \beta = \gamma = 90^\circ$ (Q) Rhombohedral (2) $a = b \neq c$, $\alpha = \beta = \gamma = 90^\circ$ (R) Orthorhombic (3) $a \neq b \neq c$, $\alpha = \gamma = 90^\circ \neq \beta$ (S) Monoclinic (4) $a = b = c$, $\alpha = \beta = \gamma \neq 90^\circ$ - The coordination number for an octahedral site in pure copper is __________.
The lattice parameter of face-centered cubic iron ($\gamma$-Fe) is 0.3571 nm. The radius (in nm) of the octahedral void in $\gamma$-Fe is _______________
- For a bcc metal the ratio of the surface energy per unit area of the (100) plane to that of the (110) plane is ________
- Pure iron transforms from body centered cubic (BCC) to face centered cubic (FCC) crystal structure at $912 \text{ °C}$. If the lattice parameter of the BCC phase is $0.293 \text{ nm}$ and that of the FCC phase is $0.363 \text{ nm}$, the associated volume change is ________ (in % to one decimal place)
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