Introductory Chemistry Homework

For many of the questions below you will need to refer to a periodic table: https://ptable.com/#Properties

 

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  1. Think of a material (living or non-living) to explore deeper. It can be something in your house, outside, a solid, a liquid, the options are literally endless!
    • Search for the elements, type of bonds, etc. that make up that material.
      • Remember that you might need to search for the composition of a smaller component of your material. (e.g. if you picked hair, you could describe the composition of keratin, a major constituent of hair. Another example: if you picked cotton, you could search for cellulose).
    • Provide a picture of the molecular structure and write a description.

 

  1. Carbon-14 is a radioactive isotope, meaning that it will emit or gain neutrons, protons, and electrons to attain a more stable atomic configuration (radioactive decay). Eventually, carbon-14, through radioactive decay, will become nitrogen-14. Based on your knowledge on the atomic structure of different atoms, explain the specifics of radioactive decay/conversion of carbon-14 to nitrogen-14 in terms of protons, neutrons, electrons, what is emitted, what is gained, and how many. What is the mass number of nitrogen-14? What about the atomic mass? Of note, both carbon-14 and nitrogen-14 are neutral in charge. You will need to refer to a periodic table.

 

  1. Compare and contrast a major similarity and difference between polar covalent bonds and ionic bonds. It may help to define them before listing a similarity and difference.

 

  1. Define both ionic and hydrogen bonds, and state a similarity between ionic bonds and hydrogen bonds. Explain the similarity, and the reason behind the similarity.

 

  1. Can you draw the structure of potassium chloride (KCl) and methane (CH4) by just looking at a periodic table? What kind of bonds are formed? Are these polar or non-polar? Why?

 

  1. Fill out the following table.

 

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