2. Chemistry

Hydrogen Bonding

Types of hydrogen bonds with examples | Intermolecular and Intramolecular Bonding - Dr K

Hydrogen Bonds - What Are Hydrogen Bonds - How Do Hydrogen Bonds Form

 is one in which two hydrogen atoms bond to each other 

No. This does not describe a hydrogen bond. Two hydrogen atoms would be bonded together by a nonpolar covalent bond to form a molecule of hydrogen gas (H2 or H&mdash;H).

 is one in which hydrogen is strongly attracted to a positively charged atom 

 No. In a hydrogen bond the hydrogen has a partial positive charge. 

 is a function of hydrophobic interactions 

Consider the nature of a hydrogen bond, and do not let the name fool you.

A hydrogen bond __________.

Hydrogen Bonding in Ethanol (C2H5OH)

Non-Covalent Interactions

Which of the following images below is the most likely way that two water molecules would interact?<img src="https://static.studychannel.pearsonprd.tech/courses/biology/thumbnails/579048eb" alt="" />

In agricultural areas, farmers pay close attention to the weather forecast. Right before a predicted overnight freeze, farmers spray water on crops to protect the plants. Use the properties of water to explain how this method works. Be sure to mention why hydrogen bonds are responsible for this phenomenon.

Water molecules form ionic bonds with one another.

What property of the bond between a Hydrogen (H) atom and an Oxygen (O) atom in a molecule of water makes it a polar bond?

Which of the following provides the strongest evidence for the conservation of tool-kit genes?
a. Bicoid moved from one fly embryo into the posterior of another fly embryo causes the formation of two head regions.

b. Mutation of an unrelated gene in another species of fly has a similar effect to mutation of bicoid in Drosophila.

c. A mouse Hox gene can be used to take over the function of a mutated Drosophila Hox gene.

d. Sheep can be cloned by fusing a differentiated adult cell with an enucleated egg.

Animation: Hydrogen Bonds

Ionic and Covalent Bonds, Hydrogen Bonds, van der Waals - 4 types of Chemical Bonds in Biology

Polar Bonds and Hydrogen Bonds

 When a molecule with partial charges contacts a molecule without partial charges 

 No. In a hydrogen bond, both atoms have a partial charge, but of opposite sign. 

 When a molecule with a low molecular weight is bonded to a molecule with a high molecular weight 

 When two atoms achieve stable electron configurations by sharing electrons with each other 

 No. Hydrogen bonding does not involve electron sharing. This would be a covalent bond. 

 When partial opposite charges on molecules come close enough to attract each other 

Consider the nature of a hydrogen bond and the influence of electronegative atoms.

When do hydrogen bonds occur?

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