Answer the following questions thoughtfully and thoroughly.
Atomic Structure
1. Name something that is not matter. Why is it not matter? (3 points)
2. How do homogeneous mixtures differ from heterogeneous mixtures? Where does the compound table salt (NaCl) fit into this description? (4 points)
3. Are atoms positive, negative, or neutral in charge? Explain. (3 points)
4. How does a molecule differ from an atom? (4 points)
5. If an element’s atomic mass and atomic number are known, what else can be determined? Give an example to demonstrate your understanding. (4 points)
Periodic Table
6. What are the rows on the periodic table called? What are the columns called? What do you know about elements in the same group? (3 points)
7. Name two elements that have similar properties. How can you tell using the periodic table? (3 points)
8. What are the chemical families on the periodic table? (4 points)
Periodic Trends
9. For main-group elements, using the older numbering system, the group number on the periodic table corresponds to which characteristic of the elements of that group? (3 points)
10. Which is more attracted to the nucleus: an electron in the outermost shell of an atom, or an electron in the innermost shell? Why? (4 points)
11. Which has more electron shells: oxygen or sulfur? How do you know? (3 points)
12. Does electronegativity increase or decrease as you move left to right across a period on the periodic table? What about down a group? Why? (4 points)
13. Which has lower ionization energy: an atom with a small radius, or an atom with a large radius? Why? (4 points)
14. Give an example of an atom that will give up its outermost electron easily. Explain why you chose this atom. (4 points)
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