The graphite of the pencil sits on top of the paper and won't affect the results. If you use ink, it will seep into the paper and itself be subjected to the chromatographic process.
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Answer:
3. Negative Ion
a negative Ion has more electrons then protons and there are more electrons
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b. Polar covalent bonds. The polar N-H bonds hold the NH3 molecules together. They are <em>intramolecular forces</em> of attraction <em>within a molecule</em>.
All the other options are <em>wrong</em>. They are <em>intermolecular forces</em> — the attractive forces <em>between different molecules</em>.
Answer:
A. It is in the gas phase.
Explanation:
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adhesion is the correct answer
adhesion is the action or process of adhering to a surface or object.