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Biology 2 1
Biology 2 1
Biology 2 1
Biology 2 1
Biology 2 1
Biology 2 1
Biology 2 1
Biology 2 1
Biology 2 1
Biology 2 1
Biology 2 1
Biology 2 1
Biology 2 1
Biology 2 1
Biology 2 1
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Biology 2 1

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  • 1. The Nature of Matter 2.1<br />
  • 2. Atom <br />A basic unit of matter.<br />
  • 3. Nucleus <br />The center of the atom which contains the protons and neutrons; in cells, structure that contains the cell’s genetic material (DNA) and controls the cell’s activities.<br />
  • 4. Electron <br />Negatively charged particle; located outside the atomic nucleus. <br />
  • 5. Molecule<br />Smallest unit of most compounds.<br />
  • 6. Van Der Waals Forces<br />A slight attraction that develops between the oppositely charged regions of nearby molecules.<br />
  • 7. Element<br />A substance that cannot be broken down into simpler substances by ordinary chemical or physical means.<br />
  • 8. Ion<br />An atom or a molecule that possesses an electrical charge.<br />
  • 9. Covalent Bond <br />A bond that forms when atoms share electrons.<br />
  • 10. Ionic Bond<br />A bond that forms between negative and positive ions.<br />
  • 11. Compound<br />A substance formed by the chemical combination of two or more elements in definite proportions and usually having properties different from those of its constituent elements.<br />
  • 12. Isotope<br />An atom with the same number of protons but different numbers of neutrons for a given element; an isotope’s mass number is different from that of the given element. <br />
  • 13. Key Concept<br />What three subatomic particles make up atoms?<br />The subatomic particles that make up atoms are protons, neutrons, and electrons.<br />
  • 14. Key Concept<br />How are all of the isotopes of an element similar?<br />Because they have the same number of electrons, all isotopes of an element have the same chemical properties.<br />
  • 15. Key Concept<br />What are the two main types of chemical bonds?<br />The main types of chemical bonds are ionic bonds and covalent bonds.<br />

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