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Catalyst10 min. Isotopes Review10 min. Ions vs. Isotopes5 min. Cations10 min. Anions10 min. Independent Practice10 min. Break5 min. Quiz30 min.

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Presentation on theme: "Catalyst10 min. Isotopes Review10 min. Ions vs. Isotopes5 min. Cations10 min. Anions10 min. Independent Practice10 min. Break5 min. Quiz30 min."— Presentation transcript:

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2 Catalyst10 min. Isotopes Review10 min. Ions vs. Isotopes5 min. Cations10 min. Anions10 min. Independent Practice10 min. Break5 min. Quiz30 min.

3 #1. What is an isotope?

4  A:  X:  Z:

5 X : element symbol

6 A: Mass Number #protons + # neutrons

7 Z : Atomic number #protons

8 Symbol (must write both symbols):  # Electrons:  # Neutrons:

9 How many protons are in the isotope 39 K? (Potassium-39) 19 (like every atom of Potassium)

10  How many neutrons are in the isotope of 26 Mg? Number of Neutrons = A-Z

11 How many neutrons are in the isotope 43 Sc? 22 neutrons

12 How many electrons are in the isotope 23 Na? (you can assume the atom is neutral) 11 electrons

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14  What are the 3 subatomic particles we’ve learned about?  What happens to an atom when the number of protons changes?  What happens when the number of neutrons changes? What’s that called?

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16 ION: an atom that has gained or lost one or more electrons **atoms with the same atomic number (number of protons), but different number of electrons

17  An atom that has lost one or more electrons (has an overall positive charge) Naming Rule: element ion

18 11 Protons 8 Neutrons Na 19 11

19 11 Protons 8 Neutrons Na 19 11

20 11 Protons 8 Neutrons Na 19 11

21 11 Protons 8 Neutrons Na 19 11 +1 Na +1

22 11 Protons 8 Neutrons Na 19 11 +1 Na Sodium Ion

23 If a neutral Magnesium atom loses two electrons, what will its overall charge be? A. -2 B. +1 C. +2 D. -1 C

24 How many electrons are in an ion of K +1 ? A. 39 B. 18 C. 19 D. 20 B

25  An atom that has gained one or more electrons (has an overall negative charge). Naming Rule: root + “ide” ion

26 9 Protons 8 Neutrons F 17 9

27 9 Protons 8 Neutrons F 17 9

28 9 Protons 8 Neutrons F 17 9

29 9 Protons 8 Neutrons F 17 9

30 9 Protons 8 Neutrons F 17 9 F

31 9 Protons 8 Neutrons F 17 9 F Fluoride Ion

32 If a neutral oxygen atom gains two electrons, what will its overall charge be? A. -2 B. +1 C. +2 D. -1 A

33 How many electrons are in an ion of Br -1 ? A. 35 B. 34 C. 36 D. 79 C

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