What Does it Mean to be Singly Ionized? - Spring Constant of DNA

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The discussion focuses on understanding the term "singly ionized" in the context of a DNA molecule that contracts when its ends become charged. Participants agree that "singly ionized" likely refers to one end becoming negatively charged and the other positively charged, each with a magnitude equal to the elementary charge. The DNA molecule, measuring 2.17 micrometers, compresses by 1.00% upon ionization, which is essential for calculating its spring constant. Clarification on the term is crucial for solving the problem accurately. Understanding the spring constant in this scenario is key to analyzing the mechanical properties of DNA under electrical influence.
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"Singly ionized"? What the...?

I have a problem where I'm trying to figure out the spring constant of a DNA molecule whose ends become "singly ionized" and so it contracts. The only problem is, I don't know what the question means by "singly charged." I would assume that it means that each side assumes opposite charges with a magnetude of the elemenary charge, but I'm not sure. I'll include the exact wording of the question if that helps:

A molecule of DNA is 2.17 micrometers long. The ends of the molecule become singly ionized--negative on one end and positive on the other. The helical molecule acts like a spring and compresses by 1.00% upon becoming charged. Determine the spring constant of the molecule.
 
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I think your interpretation is correct.

Of course, that's no guarantee. :)
 
I second the motion.
 
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