Chapter 2, Problem 10MIC

Apply the formula for the differences in electronegativities, for the following molecules, and define whether they are polar covalent, nonpolar covalent or ionic. Taking into account that: Non-polar covalent: greater than or equal to 0 but less than 0.7 Polar covalent: greater than or equal to 0.7 but less than 1.7 ionic: greater than 1.7 A)NO B)KCI C)F2 C)AsO

Unshared, or lone, electron pairs play an important role in determining the chemical and physical properties of organic compounds. Thus, it is important to know which atoms carry unshared pairs. Use the structural formulas below to determine the number of unshared pairs at each designated atom. Be sure your answers are consistent with the formal charges on the formulas. H₂C H₂ b Hc N CH2 The number of unshared pairs at atom a is The number of unshared pairs at atom b is The number of unshared pairs at atom c is The number of unshared pairs at atom a is 1 v The number of unshared pairs at atom b is Ov The number of unshared pairs at atom c is 1.

Ionic and covalent bonds join atoms into molecules. What do hydrogen bonds do?

:0-H-1--:N-H Hydrogen Bond Which statement best helps explain the formation of the hydrogen bond represented in the figure? A The oxygen has a partial positive charge, and the nitrogen has a partial negative charge. (B) The nitrogen has a partial negative charge, and the hydrogen attached to the oxygen has a partial positive charge.

What are differences between covalent bonds (both polar and nonpolar) and ionic bonds. Recognize examples of compounds with each type of bond.

Clearly explain how hydrogen bonds are formed, using water as an example.  [Hint: Include the electron structure of water and include what relative electronegativities are and how they work to develop a partial + and partial - charge].

A) Refer to the figure below, Identify and explain the two types of reactions, and describe what are the importance of these reactions to our bodies. Reaction 1 H Monomer Reaction 2 H H OH + H H H₂O H H₂O OH + H H OH OH + H H₂O H₂O OH OH + H OH OH OH OH B) What are the main chemical interactions that determine and maintain the quaternary structure of proteins. Also, what are the conditions that can alter these interactions? [

What is a covalent bond, and how does it differ from an ionic bond?

Define hydrogen bonds?