CBSE Class 12-science Answered
why does magnesium show hcp but not copper
Asked by banga71 | 14 Apr, 2017, 10:53: AM
Expert Answer
- The crystal structure adopted by a particular metal at a given temperature and pressure will be the structure which provides for the minimisation of free energy.
- The atoms of the metal will form arrangements which ensure that the electron orbitals that bond them have the repulsion/attraction due to bond length all contribute to the lowest energy state.
- Each metal has a slightly different metallic radius, which is defined as half of the distance between the two adjacent metal ions in the metallic lattice.
- Depending on the metallic radius, the lowest energy state would be achieved by different atomic arrangements.
- For the alkaline earth metals with the smaller metallic radii (beryllium and magnesium), the lowest energy state is the HCP structure.
- To achive lowest energy level, copper forms FCC.
Answered by Prachi Sawant | 15 Apr, 2017, 09:25: PM
Concept Videos
CBSE 12-science - Chemistry
Asked by rasmimajhi07 | 21 Nov, 2023, 10:22: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by pradeepkumar70258 | 04 Oct, 2023, 10:30: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by akash9322793205 | 12 Aug, 2021, 09:30: AM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by thakurranjan54 | 08 Feb, 2021, 06:32: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by sildasholly2002 | 26 Jul, 2020, 06:37: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by tejuaaygole | 11 Jul, 2020, 10:40: AM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by chandlerbong164 | 12 Apr, 2020, 07:22: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by mangeshkale423 | 25 Feb, 2020, 05:12: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by upasana.sobti | 16 Jan, 2019, 01:59: PM
ANSWERED BY EXPERT