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Name: _______________________________________ Hour: _________ Teacher: ROZEMA

Chemistry

Hydrogen Unit (Part 3)

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What Do We Know So Far?..... Initial Observations & Questions: About The Periodic Table:

About Isotopes:

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(The whole copying, pasting, and cropping thing got a lil funky here…. So just go with the flow…. Gracias! )

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“We Are Stardust” Reading

1. After reading the article, how many elements occur naturally on Earth? Were these elements always around since the beginning

of time? Explain.

2. According to the reading, which two elements were around shortly after the Big Bang? How were heavier, later elements created?

3. The article talks about atoms being like miniature “solar-systems.” From the article, what can you determine about the makeup of

an atom? Be sure to list new vocabulary you find from the reading. Next, write down the questions you have about the atom.

What can you determine about the makeup of an atom from the article?

What questions do you have about atoms?

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4. According to the reading, why do you think hydrogen is put at the first spot in the periodic table? Why do you think helium is in

the second spot?

5. Stars in the universe don’t simply appear out of nowhere, they need to be born. Describe the process of how giant gas clouds in

the universe become stars. Include in your description how the density and temperature of the star changes.

6. Can our sun make heavier elements? Explain why or why not?

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7. To create bigger elements up to iron (#26), or beyond iron, what needs to happen with the stars? Why do you think this might

need to happen?

8. Describe how small-to-medium stars die.

9. Describe how larger stars die.

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10. From the reading, what do you think the term “nuclear fusion” is? What role does this process play with atoms and elements?

How does this reading connect to what we have learned so far about atoms?

How might it connect to our initial Balloon Observations?