Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 12: Problem 56

For each of the following groups, which metal would you expect to have the highest melting point: (a) gold, rhenium, or cesium; (b) rubidium, molybdenum, or indium; (c) ruthenium, strontium, or cadmium?

Short Answer

Expert verified
The metals with the highest melting points in each group are: (a) Rhenium, (b) Molybdenum, and (c) Ruthenium. This is due to their stronger metallic bonds compared to the other metals in their respective groups.

Step by step solution

01

Group (a): Gold, Rhenium, or Cesium

Gold (Au) and Rhenium (Re) are transition metals, while Cesium (Cs) is an alkali metal. Transition metals have stronger metallic bonds and higher melting points compared to alkali metals. Therefore, Cesium will have a lower melting point compared to Gold and Rhenium. Comparing Gold and Rhenium, Rhenium has a higher melting point because it has stronger metallic bonds due to its larger number of valence electrons available for bonding. Thus, Rhenium has the highest melting point among Gold, Rhenium, and Cesium.
02

Group (b): Rubidium, Molybdenum, or Indium

Rubidium (Rb) is an alkali metal, Molybdenum (Mo) is a transition metal, and Indium (In) is a post-transition metal. As mentioned before, transition metals generally have higher melting points than alkali metals, so Molybdenum will have a higher melting point compared to Rubidium. Now, comparing Molybdenum and Indium, Molybdenum is a group 6 transition metal with more valence electrons, resulting in stronger metallic bonds and a higher melting point. Therefore, Molybdenum has the highest melting point among Rubidium, Molybdenum, and Indium.
03

Group (c): Ruthenium, Strontium, or Cadmium

Ruthenium (Ru) is a transition metal, Strontium (Sr) is an alkaline earth metal, and Cadmium (Cd) is a post-transition metal. Transition metals generally have higher melting points compared to alkali and alkaline earth metals. Thus, Ruthenium will have a higher melting point compared to Strontium. Now we need to compare Ruthenium and Cadmium. Ruthenium is a group 8 transition metal with more valence electrons, which leads to stronger metallic bonds and a higher melting point. As a result, Ruthenium has the highest melting point among Ruthenium, Strontium, and Cadmium.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Both covalent-network solids and ionic solids can have melting points well in excess of room temperature, and both can be poor conductors of electricity in their pure form. However, in other ways their properties are quite different. $$ \begin{array}{l}{\text { (a) Which type of solid is more likely to dissolve in water? }} \\ {\text { (b) Which type of solid can become a considerably better }} \\ {\text { conductor of electricity via chemical substitution? }}\end{array} $$

Silicon is the fundamental component of integrated circuits. Si has the same structure as diamond. (a) Is Si a molecular, metallic, ionic, or covalent- network solid? (b) Silicon readily reacts to form silicon dioxide, \(\mathrm{SiO}_{2}\) , which is quite hard and is insoluble in water. Is \(\mathrm{SiO}_{2}\) most likely a molecular, metallic, ionic, or covalent- network solid?

Indicate whether each statement is true or false: $$ \begin{array}{l}{\text { (a) Elastomers are rubbery solids. }} \\ {\text { (b) Thermosets cannot be reshaped. }} \\ {\text { (c) Thermoplastic polymers can be recycled. }}\end{array} $$

What is the minimum number of atoms that could be contained in the unit cell of an element with a body-centered cubic lattice? (a) \(1,(\mathbf{b}) 2,(\mathbf{c}) 3,(\mathbf{d}) 4,(\mathbf{e}) 5\)

An ester is a compound formed by a condensation reaction between a carboxylic acid and an alcohol that eliminates a water molecule. Read the discussion of esters in Section 24.4 and then give. an example of a reaction forming an ester. How might this kind of reaction be extended to form a polymer (a polyester)?
See all solutions

Recommended explanations on Chemistry Textbooks

Making Measurements

Read Explanation

Inorganic Chemistry

Read Explanation

The Earths Atmosphere

Read Explanation

Nuclear Chemistry

Read Explanation

Ionic and Molecular Compounds

Read Explanation

Organic Chemistry

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free