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ATOMS, IONS, AND
ISOTOPES….
OH MY !!!Grab your chromebook, log in
BE READY when the bell rings!
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DO NOT START THE WARM-UP
UNTIL INSTRUCTED TO DO SO!
http://www.sciencegeek.net/Chemistry/taters/Unit1Numbers2.htm
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Homework Check
Check your homework using the key on the
following slide.
Should you find an answer that you believe is
keyed wrong, don’t hesitate to ask….
I’m human and do make mistakes ☺
If you miss something and don’t
understand….ask for help !!
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The Atom!
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Proton +1
NUCLEUS
Electron - 1 OUTSIDE NUCLEUS
Neutron 0
NUCLEUS
RECALL
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Objectives:By the end of today’s class you will be able to:
○ Write the Atomic Symbol Notation of a given atom
○ Define isotopes and ions.
○ Determine the charge of an ion given the number of protons and electrons.
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Copy Into Your Notes:2 Atomic Symbol NotationS .
DID YOU NOTICE THE
DIFFERENCES????
C – 12Mass #
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ATOMIC SYMBOL NOTATION
EXAMPLES: Write the 2 forms
An atom with 33 protons and 45 neutrons
An atom with 27 protons and 33 neutrons
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ATOMIC SYMBOL NOTATION
EXAMPLES: Write the 2 forms
An atom with 33 protons and 45 neutrons
As – 78 7833As
An atom with 27 protons and 33 neutrons
Co - 60 6027Co
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You Try○ Copy the following problems and write the following in
atomic symbol notation in your notebook:
(1) Lead with 125 neutrons
(2) An element with 25 protons and 30 neutrons
(3) An element with 19 proton and 20 neutrons
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You Try○ Write the following in atomic symbol notation
207
82 Pb
55
25 Mn
39
19 K
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What is an Isotope?
○Watch the following video and write a definition for an
isotope in your notes.
○Be sure to include what subatomic particles are the
same and different in isotopes of the same atom.
https://www.youtube.com/watch?v=xjY5p-1CDr8
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Isotopes○ Isotopes are atoms of the same element with the same
number of protons but different numbers of neutrons.
○ Atoms can have more than one isotope.
○ Different isotopes can have slightly different properties.
○ Ex. Carbon-14 (radioactive) and Carbon-12 (not radioactive)
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Need further explanation? Tennis Ball Isotopes Video
○ http://www.youtube.com/watch?v=oLnuXpf4hsA
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You Try It….
Which of the following are isotopes?
A. Carbon-13 and Nitrogen-13
B. Iodine-127 and Iodine-128
C. Radon-222 and Radium-222
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Which of the following are isotopes?
A. Carbon-13 and Nitrogen-13
B. Iodine-127 and Iodine-128
C. Radon-222 and Radium-222
Why? Same element, but different
atomic mass.
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Putting It All Together
CationCarbon-11
Isotope
Carbon-13 Anion
Boron Nitrogen
Ions
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IONSWatch the following video clip and complete the statements below: https://goo.gl/7NuciQ
Ions are formed when a neutral atom gains or loses __________ to become charged.
○ Two Types
○ C______ have a ________ charge
○ A______ have a ________ charge.
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Can you explain this comic?
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Writing Ions
○ Ions are written with the same atomic symbol as an atom PLUS the ion charge as a SUPERSCRIPT (in the upper right corner).
○ Ex. Mg+2, Cl-, Li+
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You Try: Copy and CompleteION ANION OR CATION ELECTRON MOVEMENT
S -2ANION GAINED 2 e-
Na +
Mg +2
N -3
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You Try: Copy and CompleteION ANION OR CATION ELECTRON MOVEMENT
S -2ANION GAINED 2 e-
Na + CATION LOST 1 e-
Mg +2 CATION LOST 2 e-
N -3 ANION GAINED 3 e-
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Examples
Determine the charge of the following ions then write the complete Atomic Notation
○ Chlorine gains one electron (18 neutrons).
3517 Cl -1
○ Magnesium loses two electrons (12 neutrons).
2412 Mg +2
Gained 1 e-
Lost 2 e-
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You Try: Write in your notes○ Determine the charge of the following ions and write
the complete Atomic Notation.
(1) Fluorine gains one electron (7 neutrons)
(2) Sodium loses one electron (12 neutrons)
(3) Aluminum loses three electrons (14 neutrons)
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You Try: Write in your notes(1)Fluorine gains one electron (7 neutrons)
169 F -1
(2)Sodium loses one electron (12 neutrons)23
11 Na +1
(3) Aluminum loses three electrons (14 neutrons)27
13 Al +3
If you missed ANY of these…get help!!
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RETURN TO YOUR SEAT
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PRACTICE YOUR SKILLS !!
Click Here then OPEN THE GAMES
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EXIT TICKET – USE YOUR PERIODIC TABLE IN YOUR
REFERENCE TABLE
1. To change Li with no charge to Li with a +1 charge, you need to
2. Fe +2 and Fe +3 are different iron _______:
(integers above would be written as exponents)
3. What is the symbol for an ion which has 8 protons and 10
electrons?
(CHARGES ARE written as exponents)
4. How many electrons does a Lithium ion with a +1 charge
contain?
5. An ion of Beryllium-7 has a charge of +2. Respectively, how
many protons, neutrons, and electrons does this ion contain?
6. An ion of N has a charge of -3. This ion contains:
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Atomic Structure Math:
At.#, Mass#, Protons, Neutrons, Electrons
Build an Atom:
Practice Atom and Ion Math
Element Name / Symbol Flashcards
https://goo.gl/kObjLJ
EXTRA Practice:
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HOMEWORK
1)QUIZ TOMORROW– Unit 1 (Math, Measurement, Matter)
Safety/Lab Equip
2) Complete Atoms, Isotopes , Ions CW HW
–
ALWAYS BRING YOUR CALCULATOR
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IDENTIFY THE ELEMENT
YATTASupplies: Pack of “cards” / Periodic Table
(1) Separate “cards” into two stacks – names and symbols(2) Two people compete against each other(3) A third person is the “caller”(4) Keep track of total cards you earn in each round(5) Rotate until ALL members of group have competed twice
Learning Team Activity