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DO NOW

DO NOW. How many protons, neutrons, and electrons does Chlorine ( Cl ) have? Find the number of neutrons in an atom of Boron (B) What equation are you using to find the number of neutrons? Why do you think that there are decimal points in the mass of elements?. DO NOW REVIEW.

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DO NOW

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  1. DO NOW • How many protons, neutrons, and electrons does Chlorine (Cl) have? • Find the number of neutrons in an atom of Boron (B) • What equation are you using to find the number of neutrons? • Why do you think that there are decimal points in the mass of elements?

  2. DO NOW REVIEW • How many protons, neutrons, and electrons does Chlorine (Cl) have? • Find the number of neutrons in an atom of Boron (B) • What equation are you using to find the number of neutrons? • Why do you think that there are decimal points in the mass of elements?

  3. Today’s Objectives: • SWBAT define isotopes and ions. • SWBAT determine the number of protons, neutrons, and electrons in isotopes and ions. Today’s Agenda: • First 3 (3) • Do Now (4) • DN Share out (4) • Objectives/Agenda (2) • HW (2) • Hook (6) ------------------------------ • Mad Minute (5) • Isotopes (6) • Model/ Turn and Talk (3) • Guided Practice (4) • Brain Break (5) • Ions (6) • Mode/ Turn and Talk (3) • Guided Practice (4) • Independent Practice (15) ------------------------------ • Mastery Check (4) • Track (2) • Last 3 (3)

  4. HOMEWORK • Reading in your email

  5. MASTERY CHECK Question #1 Question #2 Determine the number of protons, neutrons and electrons in the following isotopes: 20Ne and Ne-22 Determine the number of protons and electrons in the following ions:Na+1 and O-2

  6. MAD MINUTE!!

  7. ISOTOPES! Notes expectations: We are silent We are writing what is in red We only ask questions about content No bathroom

  8. ISOTOPES Key Point #1: Two atoms of the same element that have a different number of neutrons are called isotopes. We can have more or less neutrons without changing what element we are talking about. Why?

  9. ISOTOPES • Key Point #2: Having extra neutrons changes the mass of the element because MASS = #PROTONS + #NEUTRONS My # of protons never changes, but if my neutrons change, so will my mass!

  10. ISOTOPES • Key Point #3: Isotope notation lets you know the mass of an element(in case it is different than usual). From there, we can figure out the # of neutrons for that isotope 16 7 OR Nitrogen - 16 Mass Element symbol N Mass Atomic number

  11. ISOTOPES • Key Point #4: The periodic table shows the average massof the element in nature.

  12. PRACTICE WITH HELP Question #1 Question #2 Determine the number of protons, neutrons and electrons in the following isotopes: 23Al and Ar-42 An element has 19 protons, 23 neutrons, and 19 electrons. What element is this?

  13. IONS!!

  14. IONS ARE EZ! • Key Point #5: An ion is an atom or group of atoms that has a positive or negative charge • Remember when I said that we will assume all atoms are neutral unless told otherwise…NOW is that time!

  15. What Does It Mean When I Have an Ion? • Key Point #6: When an atom is an anion (negative), it has extra electrons • This makes sense – having MORE negative parts will create a negative charge • Key Point #7: When an atom is a cation (positive), it has lost electrons • Same thing here – having LESS negative parts will create a positive charge

  16. Practice • For example: • How many electrons would an atom of Fluorine normally have? • NINE! • If I had an ion of Fluorine that said F1- • Does this mean I have extra electrons? Or that I have lost electrons? • EXTRA! • So that means I have one extra electron, so how many will I have now? • TEN!

  17. INDEPENDENT PRACTICE • Work on your worksheet independently and quietly • If you have a question you should: • Look back to your notes • Quietly ask a neighbor • Raise your hand to ask your teacher for help POUR yourself into your work!

  18. MASTERY CHECK Question #1 Question #2 Determine the number of protons, neutrons and electrons in the following isotopes: 20Ne and Ne-22 Determine the number of protons and electrons in the following ions:Na1+ and O2-

  19. HOMEWORK • In your email

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