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Launch <ul><li>Place completed Assessment Reflection Worksheet on desk </li></ul><ul><li>Answer the following four questio...
What is an element? Mr. Heffner Chemistry 9/15/09
What is matter? <ul><li>Stuff! </li></ul>Elements
What is an element? <ul><li>An element is… </li></ul><ul><ul><li>pure substance that is made up of only one type of atom <...
What is an element?
What is an element? <ul><li>“…one type of atom”?  </li></ul><ul><ul><li>Every atom of an element has the same number of pr...
Summary <ul><li>Matter    elements    atoms </li></ul><ul><li>Elements are pure substances made up of atoms that have th...
Foldable <ul><li>Fold in half 3X, then unwrap and fold in windows </li></ul><ul><ul><li>Cut with scissors  </li></ul></ul>...
What is an element? <ul><li>Element is represented by a box on the periodic table </li></ul><ul><ul><li>1 </li></ul></ul><...
What is an element? Atomic number Symbol Name <ul><ul><li>1 </li></ul></ul><ul><ul><li>H </li></ul></ul><ul><ul><li>Hydrog...
What is an element? Atomic number Symbol Name <ul><ul><li>79 </li></ul></ul><ul><ul><li>Au </li></ul></ul><ul><ul><li>Gold...
What is an element? <ul><li>The periodic table is organized by atomic number </li></ul><ul><li>Trend: a general rule that ...
What is an element? <ul><li>Which of the following has a higher atomic number? </li></ul><ul><ul><li>C (Carbon) or N (Nitr...
Summary <ul><li>Elements are represented as boxes on the periodic table </li></ul><ul><ul><li>Atomic number is found above...
Practice Questions <ul><li>Answer the following in complete sentences: </li></ul><ul><li>What is the definition of an elem...
Exit Slip <ul><li>1.  All atoms of an element have </li></ul><ul><ul><li>a. the same number of protons. </li></ul></ul><ul...
Exit Slip <ul><li>3.  What is the atomic number of F (Fluorine)? </li></ul><ul><ul><li>a. 1 </li></ul></ul><ul><ul><li>b. ...
Exit Slip <ul><li>5.  Which element has a smaller atomic number than O (Oxygen)? </li></ul><ul><ul><li>a. F (Fluorine) </l...
Homework <ul><li>Finish Practice Questions </li></ul><ul><li>Finish Foldable </li></ul>
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What is an element?

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What is an element?

  1. 1. Launch <ul><li>Place completed Assessment Reflection Worksheet on desk </li></ul><ul><li>Answer the following four questions in complete sentences: </li></ul><ul><ul><li>Are the assessment reflections a useful tool? Why or why not? </li></ul></ul><ul><ul><li>On a scale from 1-10, how well do the assessment reflections help prepare you for the next quiz/exam? </li></ul></ul><ul><ul><li>What is one change that you would implement to make the process more useful? </li></ul></ul>
  2. 2. What is an element? Mr. Heffner Chemistry 9/15/09
  3. 3. What is matter? <ul><li>Stuff! </li></ul>Elements
  4. 4. What is an element? <ul><li>An element is… </li></ul><ul><ul><li>pure substance that is made up of only one type of atom </li></ul></ul><ul><li>An element has… </li></ul><ul><ul><li>a unique set of physical and chemical properties </li></ul></ul><ul><li>Examples of elements: </li></ul><ul><ul><li>Gold </li></ul></ul><ul><ul><li>Helium </li></ul></ul><ul><ul><li>Sodium </li></ul></ul>
  5. 5. What is an element?
  6. 6. What is an element? <ul><li>“…one type of atom”? </li></ul><ul><ul><li>Every atom of an element has the same number of protons </li></ul></ul><ul><li>Atomic number is… </li></ul><ul><ul><li>The number of protons in an atom </li></ul></ul><ul><li>So put another way, every atom of a specific element has the same atomic number! </li></ul>
  7. 7. Summary <ul><li>Matter  elements  atoms </li></ul><ul><li>Elements are pure substances made up of atoms that have the same atomic number </li></ul><ul><li>Atomic number = # of protons </li></ul>
  8. 8. Foldable <ul><li>Fold in half 3X, then unwrap and fold in windows </li></ul><ul><ul><li>Cut with scissors </li></ul></ul><ul><ul><li>3 hole-punch </li></ul></ul><ul><li>Terms: only 4! </li></ul><ul><ul><li>Element </li></ul></ul><ul><ul><li>Periodic Table of Elements (mini-picture) </li></ul></ul><ul><ul><li>Proton (charge, mass, location) </li></ul></ul><ul><ul><li>Atomic number </li></ul></ul><ul><li>Quiz yourself when finished </li></ul>
  9. 9. What is an element? <ul><li>Element is represented by a box on the periodic table </li></ul><ul><ul><li>1 </li></ul></ul><ul><ul><li>H </li></ul></ul><ul><ul><li>Hydrogen </li></ul></ul>
  10. 10. What is an element? Atomic number Symbol Name <ul><ul><li>1 </li></ul></ul><ul><ul><li>H </li></ul></ul><ul><ul><li>Hydrogen </li></ul></ul>
  11. 11. What is an element? Atomic number Symbol Name <ul><ul><li>79 </li></ul></ul><ul><ul><li>Au </li></ul></ul><ul><ul><li>Gold </li></ul></ul>
  12. 12. What is an element? <ul><li>The periodic table is organized by atomic number </li></ul><ul><li>Trend: a general rule that is followed </li></ul><ul><li>Trend in atomic number </li></ul><ul><ul><li>INCREASES from Left to Right </li></ul></ul><ul><ul><li>INCREASES from Top to Bottom </li></ul></ul>
  13. 13. What is an element? <ul><li>Which of the following has a higher atomic number? </li></ul><ul><ul><li>C (Carbon) or N (Nitrogen)? </li></ul></ul><ul><ul><li>C (Carbon) or Si (Silicon)? </li></ul></ul><ul><ul><li>C (Carbon) or Ge (Germanium)? </li></ul></ul>
  14. 14. Summary <ul><li>Elements are represented as boxes on the periodic table </li></ul><ul><ul><li>Atomic number is found above the symbol </li></ul></ul><ul><li>The periodic table is organized by increasing atomic number </li></ul>
  15. 15. Practice Questions <ul><li>Answer the following in complete sentences: </li></ul><ul><li>What is the definition of an element? </li></ul><ul><li>Are atoms of an element the same of different? </li></ul><ul><li>What is atomic number? </li></ul><ul><li>Draw and label the representation of N (Nitrogen). </li></ul><ul><li>What is the atomic number of He (Helium)? </li></ul><ul><li>What is the atomic number of Cl (Chlorine)? </li></ul><ul><li>What is the trend in atomic number? </li></ul>
  16. 16. Exit Slip <ul><li>1. All atoms of an element have </li></ul><ul><ul><li>a. the same number of protons. </li></ul></ul><ul><ul><li>b. the same number of neutrons. </li></ul></ul><ul><ul><li>c. the same number of electrons. </li></ul></ul><ul><ul><li>d. neither mass nor volume. </li></ul></ul><ul><li>2. Which of the following is true for atomic number? </li></ul><ul><ul><li>a. it is what defines an element </li></ul></ul><ul><ul><li>b. it is the sum of all the protons in an atom’s nucleus </li></ul></ul><ul><ul><li>c. it can be found on the periodic table </li></ul></ul><ul><ul><li>d. all of the above </li></ul></ul>
  17. 17. Exit Slip <ul><li>3. What is the atomic number of F (Fluorine)? </li></ul><ul><ul><li>a. 1 </li></ul></ul><ul><ul><li>b. 9 </li></ul></ul><ul><ul><li>c. 19 </li></ul></ul><ul><ul><li>d. 19.00 </li></ul></ul><ul><li>4. How does atomic number vary throughout the periodic table? </li></ul><ul><ul><li>a. it is fixed and does not change as you move across the periodic table </li></ul></ul><ul><ul><li>b. it decreases from left to right, and from top to bottom </li></ul></ul><ul><ul><li>c. it increases from left to right, and from top to bottom </li></ul></ul><ul><ul><li>d. it increases from right to left, and from top to bottom </li></ul></ul>
  18. 18. Exit Slip <ul><li>5. Which element has a smaller atomic number than O (Oxygen)? </li></ul><ul><ul><li>a. F (Fluorine) </li></ul></ul><ul><ul><li>b. P (Phosphorous) </li></ul></ul><ul><ul><li>c. Na (Sodium) </li></ul></ul><ul><ul><li>d. B (Boron) </li></ul></ul>
  19. 19. Homework <ul><li>Finish Practice Questions </li></ul><ul><li>Finish Foldable </li></ul>

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