4- A hypothetical metal has atomic weight of 102.9 g/mol and a density of 12.41 g/cm³. The atomicradius is 0.1345 nm. The crystal structure is:a) SCb) ВССc) FCCd) HCР

Given: Atomic weight of metal = 102.9 g/mol Density = 12.41 g/cm3 Radius = 0.1345 nm

Answered: 4- A hypothetical metal has atomic…

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter21: The Chemistry Of The Main Group Elements

Section: Chapter Questions

Problem 130SCQ

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23. Molybdenum has a BCC crystal structure, an atomic radius of 0.1363 nm, and an atomic weight of 95.94 g/mol. The theoretical density.is O11.21 g/cm3 O 12.21 g/cm3 O 13.21 g/cm3 O 10.21 g/cm3
An element with density 11.2 g cm-3 forms an fee lattice with edge length of 4 X 10-8cm. Calculate the atomic mass of the element. (Given: NA = 6.022 X 1023 mol-1)
A hypothetical metal has the BCC crystal structure, a density of 7.24 g/cm3, and an atomic weight of 48.9 g/mol. The atomic radius of this metal is 0.122 nm 0.0997 nm 1.22 nm 0.154 nm
Which of the following compounds is expected to have the highest melting point? MgO BaS CaCl2 K2O SrSe
4. Fill in the following phase changes: Solid to Liquid= Liquid to Solid= Liquid to Gas= Gas to Liquid= Solid to Gas= Gas to Solid= 5. Which type of bond is the strongest and would therefore lead to the strongest minerals?
5. Atomic radius, crystal structure, electronegativity, and the most common valence are given in the follo table for several elements; for those that are nonmetals, only atomic radii are indicated. Crystal Structure FCC Element Ni Atomic Radius (nm) 0.1246 Electronegativity 1.8 Valence 0.071 H 0.046 0.060 0.1445 0.1431 0.1253 0.1249 FCC 1.4 1.5 1.7 1.6 +1 Ag Al Co FCC HCP BCC +3 +2 +3 Cr Fe Pt Zn 0.1241 0.1387 ВСС FCC 1.7 1.5 +2 +2 0.1332 HCP 1.7 +2 Which of these elements would you expect to form the following with nickel: (a) A substitutional solid solution having complete solubility (b) A substitutional solid solution of incomplete solubility (c) An interstitial solid solution
WHICH COMPOUND HAS THE SAME CRYSTAL STRUCTURE AS BiF3
compound 1 2 3 description Compound 1 is a yellow solid made up of clusters of needle-like crystals. It's a good electrical insulator when solid, but if crushed and dissolved in water, the solution is a good conductor. Compound 2 is a hard light gray solid made up of clusters of cube-shaped crystals. It can easily be ground into a fine powder. If that powder is compressed to form a block, the block is an insulator. However, if the block is moistened slightly, it starts to conduct electricity much better. Compound 3 is a deep red solid with a noticeable unpleasant smell. It dissolves slightly in water, and a solution of 2 g in 100 mL of water doesn't change the electrical conductivity of the water. ionic or molecular? O ionic O molecular O (can't decide) O ionic O molecular O (can't decide) O ionic O molecular O (can't decide)
QUESTION 5 Atomic radius, crystal structure, electronegativity, and the most common valence are tabulated in the following table for several elements; for those that are nonmetals, only atomic radii are indicated Atomic Radius (пт) Crystal Electro- Element Structure negativity Valence Cu 0.1278 FCC 1.9 +2 C 0.071 H 0.046 0.060 Ag 0.1445 FCC 1.9 +1 Al 0.1431 FCC 1.5 +3 Co Cr +2 +3 0.1253 НСР 1.8 ВСС ВСС 0.1249 1.6 Fe 0.1241 1.8 +2 Ni 0.1246 FCC 1.8 +2 2.2 2.2 Pd 0.1376 FCC +2 Pt 0.1387 FCC +2 Zn 0.1332 НСР 1.6 +2 Which of these elements would you expect to form the following with copper: (a) A substitutional solid solution having complete solubility (b) A substitutional solid solution of incomplete solubility (c) An interstitial solid solution
2. What important information does the melting point of a substance provide?
From the data in following table, compute the theoretical density of CaF2, which has the fluorite structure, the atomic weight of Ca²+ and F are 40.08 g/mol and 19.00 g/mol, respectively. Cation A1³+ Ba²+ Ca²+ Cs+ Fe²+ Fe³+ Ionic Radius (nm) 0.053 0.136 0.100 0.170 0.077 0.069 Anion Br CI F I 0²- 82- Ionic Radius (nm) 0.196 0.181 0.133 0.220 0.140 0.184 O Ca2+
An element has a density of 10.25 g/cm3 and a metallic radius of 136.3 pm. The metal crystallizes in a bcc lattice. Determine its atomic weight.

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4- A hypothetical metal has atomic weight of 102.9 g/mol and a density of 12.41 g/cm. The atomic radius is 0.1345 nm. The crystal structure is: a) SC b) ВСС c) FCC d) НCP