1. Science Starter
What information can you gain about Gold (Au) just from looking at the PToE?
Fill in the following information:
Element: Zinc Number of Protons:
Atomic Number: Number of Neutrons:
Mass Number: Number of Electrons:
3. What’s one thing you understood, one
thing you didn’t understand yesterday?

2. Objective
SWBAT identify the differences between neutral atoms, ions, and isotopes.
SWBAT provide number of protons, neutrons, and electrons for neutral atoms, isotopes, and ions.

3. Agenda Science Starter Announcements Atomic Structure Review
Isotopes & Ions
Exit Ticket

4. Today: Isotopes and Ions Thursday: Review Friday: Unit 1 Test
Announcements
Today: Isotopes and Ions
Thursday: Review
Friday: Unit 1 Test
Monday: Unit 2: Intro to the Periodic Table
This includes videos, coloring, etc.

5. 7 3 3 3 7 Li 12 6 6 12 6 C 35 17 17 18 17 Cl 47
107 47 Ag 47 60
107

6. Unit 1: Chemistry Matters Isotopes and Ions
February 3, 2016

7. Isotope
Isotopes: atoms that have the same number of protons but different number of neutrons.
Ex: carbon-12 and carbon-14
The number next to the element represents the mass number.

8. **** Notice that this is a new notation!****
Isotope Notation
Carbon - 14
Mass Number
Element Name
**** Notice that this is a new notation!****

9. STOP AND THINK
What are the three types of notations that we have talked about so far? How do they differ?

10. Practice Aluminum-27 Aluminum-28 Copper- 64 Copper-60 Al-27 13 14 13
Element
Chemical Symbol
# protons
# neutrons
# electrons
Aluminum-27
Aluminum-28
Copper- 64
Copper-60
Al-27 13 14 13
Al-28 13 15 13

11. Discuss with Your Table
What is different about isotopes of the same element?
______________
What is the same about isotopes of the same element?

12. Review: Model of the atom so far
We know…
Protons and neutrons are in the _________ ?
Electrons are located __________ ?

13. What is true about protons and electrons in a NEUTRAL (regular) atom?
Ions
Electrons
Where to they exist?
What charge do they have?
What is true about protons and electrons in a NEUTRAL (regular) atom?

14. Think about what charge electrons have.
Ions
ION = an atom with a positive or negative charge; atom with extra or fewer electrons
Think about what charge electrons have.
Anion: a negative ion
 Does this have MORE or LESS electrons???
Cation: a positive ion
Let’s draw this so we can see…

15. Picture of Fl-
(pluses and minuses)

16. Picture of Fl-
(pluses and minuses)

17. THINK: Can we add or subtract protons to affect charge?

18. Substance: Chloride Symbol: Cl-1 Atomic Number: Mass Number: 35 Number of Protons: Number of Neutrons: 18 Number of Electrons:

19. Substance: Oxide ion Symbol: O2- Atomic Number: 8 Mass Number: 16 Number of Protons: Number of Neutrons: Number of Electrons:

20. Substance: Strontium ion Symbol: Sr 2+ Atomic Number: Mass Number: 76 Number of Protons: 38 Number of Neutrons: Number of Electrons:

21. Discuss… What is different about ions of the same element?
______________
What is the same about ions of the same element?

22. Atom, Isotope, Ion Worksheet Partner Practice
With a partner at your table, complete the ion worksheet. You will have approximately 10 minutes.
Only talk about the task at hand. I will take points off your grade if you are not!
Once you have decided on an area to work, you may not get out of your seat unless you ask.
When you finish, raise your hand, and I will send you to the solution station to check your answers!

23. Exit Ticket

24. What charge does a cation have? How many electrons does Cl- have?
Exit Ticket
What charge does a cation have?
How many electrons does Cl- have?
How many protons, neutrons, and electrons in C-14?
Write the nuclear notation for the following element.
P = 7 N = 8 E = 10