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Biology 12
Basic Chemistry Review
Section 2.1 pg 20-25
1. What is matter?
Examples include:
2. Elements are the basic building blocks of matter. How many naturally occurring elements
are there? _______
3. Elements are made up of ____________.
4. Label the diagram below.
5. Atomic Mass is equal to __________ + ____________
6. Atoms that have the same atomic number, but differ in the number of neutrons are
called __________.
7. When atoms bond with each other, they form ____________.
Do all the atoms have to be of the same type? ____
What is it called when there are different atoms? __________.
8. An ion is ____________________________________.
9. What is the difference between an ionic and a covalent bond?
Over (
10. Using Figure 2.7, complete the following chart.
|Electron-Dot Formula |Structural Formula |Molecular Formula |
| | | |
| | | |
| | | |
|carbon dioxide |carbon dioxide |carbon dioxide |
| | | |
| | | |
| | | |
|water |water |water |
11. Compare single, double, and triple bonds.
|Type of Bond |Single |Double |Triple |
|Electrons shared | | | |
|Representation | | | |
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