{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chap 37 SM - Chapter 37 Molecules Conceptual Problems 1[SSM...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
159 Chapter 37 Molecules Conceptual Problems 1 [SSM] Would you expect NaCl to be polar or nonpolar? Determine the Concept Yes. Because the center of charge of the positive Na ion does not coincide with the center of charge for the negative Cl ion, the NaCl molecule has a permanent dipole moment. Hence, it is a polar molecule. 2 Would you expect N 2 to be polar or nonpolar? Determine the Concept Because a N 2 molecule has no permanent dipole moment, it is a non-polar molecule. 3 Does neon naturally occur as Ne or Ne 2 ? Explain your answer. Determine the Concept No. Neon naturally occurs as Ne, not Ne 2 . Neon is a rare gas atom with a closed shell electron configuration. 4 What type of bonding mechanism would you expect for atoms of ( a ) HF, ( b ) KBr, ( c ) N 2 , ( d ) Ag in solid silver? Determine the Concept ( a ) Because an electron is transferred from the H atom to the F atom, the bonding mechanism is ionic. ( b ) Because an electron is transferred from the K atom to the Br atom, the bonding mechanism is ionic. ( c ) Because the atoms share two electrons, the bonding mechanism is covalent. ( d ) Because each valence electron is shared by many atoms, the bonding mechanism is metallic bonding. 5 •• [SSM] The elements on the far right column of the periodic table are sometimes called noble gases, both because they are gasses under a wide range of conditions, and because atoms of these elements almost never react with other atoms to form molecules or ionic compounds. However, atoms of noble gases can react if the resulting molecule is formed in an electronic excited state. An example is ArF. When it is formed in the excited state, it is written ArF* and is called an excimer (for ex cited dimer ). Refer to Figure 37-13 and discuss how a
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon