A nonmetal element in the third row of the periodic table exists as two allotropes (two different physical forms of the same element). One allotrope exists as an extended network while the other exists as discrete molecules. In the lab, you gather the following evidence about two allotropes of this element: Physical Form of Element Melting Point Allotrope 1 Allotrope 2 Which allotrope do you predict likely exists as an extended network and why? 1. Allotrope 2 because strong covalent bonds within the molecule require a lot of energy to break when melting a substance from a solid to a liquid. 2. Allotrope 1 because small molecules require less energy due to the weaker interactions to overcome compared to breaking strong covalent bonds when an extended network melts (essentially disintegrating). 3. Allotrope 1 because its lower melting point suggests that it makes a good liquid. 4. The data is wrong as all allotropes of the same element must have the same properties. 5. It is impossible to tell from the given data whether the substance exists as an extended network or discrete molecules. 1 O 3 0 388 K 4 1687 K 2

A nonmetal element in the third row of the periodic table exists as two allotropes (two different physical forms of the same element). One allotrope exists as an extended network while the other exists as discrete molecules. In the lab, you gather the following evidence about two allotropes of this element: Physical Form of Element Melting Point Allotrope 1 Allotrope 2 Which allotrope do you predict likely exists as an extended network and why? 1. Allotrope 2 because strong covalent bonds within the molecule require a lot of energy to break when melting a substance from a solid to a liquid. 2. Allotrope 1 because small molecules require less energy due to the weaker interactions to overcome compared to breaking strong covalent bonds when an extended network melts (essentially disintegrating). 3. Allotrope 1 because its lower melting point suggests that it makes a good liquid. 4. The data is wrong as all allotropes of the same element must have the same properties. 5. It is impossible to tell from the given data whether the substance exists as an extended network or discrete molecules. 1 O 3 0 388 K 4 1687 K 2

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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