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?
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.
Agenda Science Starter Announcements Atomic Structure Review Isotopes & Ions Exit Ticket
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.
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
Unit 1: Chemistry Matters Isotopes and Ions February 3, 2016
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. http://www.huffingtonpost.com/2012/05/22/carbon-dating-science-history-dinosaurs-human_n_1536274.html
**** Notice that this is a new notation!**** Isotope Notation Carbon - 14 Mass Number Element Name **** Notice that this is a new notation!****
STOP AND THINK What are the three types of notations that we have talked about so far? How do they differ?
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
Discuss with Your Table What is different about isotopes of the same element? ______________ What is the same about isotopes of the same element?
Review: Model of the atom so far We know… Protons and neutrons are in the _________ ? Electrons are located __________ ?
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?
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…
Picture of Fl- (pluses and minuses)
Picture of Fl- (pluses and minuses)
THINK: Can we add or subtract protons to affect charge?
Substance: Chloride Symbol: Cl-1 Atomic Number: Mass Number: 35 Number of Protons: Number of Neutrons: 18 Number of Electrons:
Substance: Oxide ion Symbol: O2- Atomic Number: 8 Mass Number: 16 Number of Protons: Number of Neutrons: Number of Electrons:
Substance: Strontium ion Symbol: Sr 2+ Atomic Number: Mass Number: 76 Number of Protons: 38 Number of Neutrons: Number of Electrons:
Discuss… What is different about ions of the same element? ______________ What is the same about ions of the same element?
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!
Exit Ticket
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