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  • 1. 11/21/11 A/B DayLEQ: How can neutrons and electronsaffect the characteristics of an atom?1. What is an isotope?2. How do we find the number of neutrons in anatom?3. How many protons and neutrons does He-5have?4. Which atom has more mass? N-14 or N-16?5. Explain your answer for # 4! How did youknow?!
  • 2. Let’s Review: UNSCRAMBLE!Protons =Electrons =Neutrons =
  • 3. Let’s Review: UNSCRAMBLE!Protons = POSITIVEElectrons = NEGATIVENeutrons = NEUTRAL
  • 4. LET’S REVIEW: N-14Protons = 7Electrons = 7Neutrons = 7
  • 5. Normal Nitrogen Atom: Equal # ofprotons and electrons PROTONS ELECTRONS + - + - + - + - + - + - + -
  • 6. LETS REVIEW: DRAWING ELECTRONSHelium (He) Nitrogen (N) Sodium (Na)Period: 1 Period: 2 Period: 3Ring(s): 1 Ring(s): 2 Ring(s): 3
  • 7. How do we know how many electrons fit in each ring? COUNT!1st Period = 22nd Period = 83rd Period = 8
  • 8. Today’s LEQ: How can neutrons andelectrons affect the characteristics of an atom? By the end of today, you should be able to… 1. Model isotopes when given a specific atomic mass 2. Model ions when given specific charge 3. Tell the charge of a diagram of an atom
  • 9. Focus Vocabulary:66. Isotope67. Ion68. Valence Electron
  • 10. ION
  • 11. IONAtom with a different number ofelectrons; has a + or — CHARGE
  • 12. Normal Nitrogen Atom: Equal # ofprotons and electrons PROTONS ELECTRONS + - + - + - + - + - + - + -
  • 13. Nitrogen ION: NITROGEN ATOM THATHAS EITHER GAINED OR LOST ELECTRONS PROTONS ELECTRONS + - + - + - + - + - + - + Missing Electrons!
  • 14. NORMAL NITROGEN Protons: 7 Neutrons: 7 Electrons: 7 Protons: 7 Neutrons: 7 Electrons: 6 NITROGEN ION
  • 15. NORMAL NITROGEN Protons: 7 Neutrons: 7 Electrons: 7 Protons: 7 Neutrons: 7 Electrons: 8 NITROGEN ION
  • 16. BrainPop-Ions
  • 17. Draw this in your notes… VALENCE ELECTRONS: ELECTRONS IN THE OUTERMOST RING
  • 18. HOW MANY VALENCE ELECTRONS?
  • 19. HOW MANY VALENCE ELECTRONS?
  • 20. HOW MANY VALENCE ELECTRONS?
  • 21. Which one is the ion? HELIUM
  • 22. Which one is the ion? LITHIUMION
  • 23. Which one is the ion? FLOURINE ION
  • 24. ION Atom with a different number of electronsN1+ = nitrogen that LOST one valenceelectronN2- = nitrogen that GAINED two valenceelectrons
  • 25. Copy this in your notes… 2-ELEMENT ATOM’SSYMBOL CHARGE
  • 26. Finding the CHARGE of an ION:1.Draw a T-Chart2.Count the protons3.Count the electrons4.Calculate the charge!
  • 27. What is the charge of each atom? HELIUM + - + - CHARGE: 0 ION? NO!
  • 28. What is the charge of each atom? HELIUM + - + CHARGE: 1+ ION? YES!
  • 29. What is the charge of each atom? LITHIUM + - + - + - CHARGE: 0 ION? NO!
  • 30. What is the charge of each atom? LITHIUM + - + - + - CHARGE: 1+ ION? YES!
  • 31. What is the charge of each atom? FLOURINE CHARGE: 0 ION? NO! + - + - + - + - + - + - + - + - + -
  • 32. What is the charge of each atom? FLOURINE CHARGE: -1 ION? YES! + - + - + - + - + - + - + - + - + - -
  • 33. In your notebook:1. Protons Electrons Charge: Ion:
  • 34. 1. Protons: 6 4. Protons: 16 7. Protons: 9 Electrons: 5 Electrons: 18 Electrons: 9 Charge: 1+ Charge: 2- Charge: 0 Ion: YES Ion: YES Ion: NO2. Protons: 8 5. Protons: 2 8. Protons: 5 Electrons: 8 Electrons: 1 Electrons: 7 Charge: 0 Charge: 1+ Charge: 2- Ion: NO Ion: YES Ion: YES3. Protons: 10 6. Protons: 11 9. Protons: 18 Electrons: 10 Electrons: 10 Electrons: 16 Charge: 0 Charge: 1+ Charge: 2+ Ion: NO Ion: YES Ion: YES
  • 35. 10. Protons: 3 Electrons:3 Charge: 0 Ion? No
  • 36. Summarizer:1. What is an ion?2. What happens to an atom when it gains an electron?3. What happens to an atom when it loses an electron?4. A carbon atom has 8 electrons. Is it an ion?5. A nitrogen atom has 5 electrons. What is its charge?