Chapter U2.9, Problem 3E

Interpretation Introduction

Interpretation:

Model pieces needed to build a ball-and-stick model of geraniol are to be listed.

Concept introduction:

Molecules are three dimensional. A ball-and-stick model helps us in knowing the exact arrangement of atoms in space. The molecular model set helps in building the three dimensional structure of the molecule.

Answer to Problem 3E

A ball-and-stick modelof geraniol(C₁₀H₁₈O) needs the following pieces:

• Carbon atoms - 10
• Hydrogen atoms - 18
• Oxygen atoms - 1
• Bondsticks - 30

Explanation of Solution

A ball-and-stick model of a molecule can be made using a tool called molecular model set. It consists of spheres of different sizes and colors to denote different atoms like carbon, hydrogen, oxygen and nitrogen and bond sticks are used to represent bonds between atoms. The kit also has lone pair paddles.

In geraniol, the carbon atoms are connected in long chain. Its molecular formula is C₁₀H₁₈O.

To build a ball-and-stick model for geraniol one need spheres for carbon atoms (10), hydrogen atoms (18) and oxygen atom (1). To represent bonds one need 30 bond sticks.

Conclusion

The structural formula of a molecule shows the molecule flat with the carbon atoms arranged in line whereas the ball and stick model shows the three dimensional structure of the molecule. This helps in better understanding the shape of the molecule. To build the model we need a model kit.