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Notes: Subatomic Particles

CW: Graphic Organizer

H: An Atom
Subatomic Particles
        December 8, 2008
Objectives
1. Describe three subatomic particles

3. Define amu, atomic mass, atomic
   number, isotope
1. The Latin word atomos, is the basis for
    the word atom. What does the word
    atomos mean?

     A. nucleus
     B....
2. Indirect evidence about an object is
   evidence gathered

A. by reading a textbook
B. using your senses
C. without any...
3. Rutherford’s model of the atom is similar
   to

A. the solar system
B. raw chocolate chip cookie dough
C. a peach
What is an atom?
 the smallest unit
  of matter that
  keeps the
  identity of the
  element
3 subatomic particles
                   electron




                              neutron


Nucleus

                   ...
Protons
 Positive charge

 Found in the nucleus

 Mass of 1 AMU (atomic mass unit)
Atomic Number
 This number indicates the number of
  protons in an atom

 The number of protons identifies the
  atom.
Neutrons

 No charge

 Found in the nucleus

 Mass of 1 AMU (atomic mass unit)
Mass Number
= protons + neutrons




              © Addison-Wesley Publishing Company, Inc.
Isotopes
 Atoms of the same element with
  different mass numbers.

                        12
                          ...
It’s the Isotopes!
Periodic Table
Electrons
•Negative Charge

•Found in energy levels outside the
nucleus

•Mass of 1/1836 AMU (almost
nothing!)
Ion
Neutral atom - The number of electrons =
 number of protons.

Ion - The number of electrons is different
  from the nu...
PRACTICE PROBLEMS
15
     N
                  7                8                 7
     # protons = ____ # neutrons= ____ ...
Learning Check
 Naturally occurring carbon consists of three isotopes,
 12
   C, 13C, and 14C. State the number of protons...
Solution
     12
          C    13
                    C             C
                                 14
     6         ...
Quick Review:
 The three subatomic particles are
  proton, neutron and electron
 Protons are positively charged,
  elect...
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Transcript of "Subatomic Particles 2008"

  1. 1. Notes: Subatomic Particles CW: Graphic Organizer H: An Atom
  2. 2. Subatomic Particles December 8, 2008
  3. 3. Objectives 1. Describe three subatomic particles 3. Define amu, atomic mass, atomic number, isotope
  4. 4. 1. The Latin word atomos, is the basis for the word atom. What does the word atomos mean? A. nucleus B. indivisible C. small
  5. 5. 2. Indirect evidence about an object is evidence gathered A. by reading a textbook B. using your senses C. without any experimenting
  6. 6. 3. Rutherford’s model of the atom is similar to A. the solar system B. raw chocolate chip cookie dough C. a peach
  7. 7. What is an atom?  the smallest unit of matter that keeps the identity of the element
  8. 8. 3 subatomic particles electron neutron Nucleus proton Electron Cloud
  9. 9. Protons  Positive charge  Found in the nucleus  Mass of 1 AMU (atomic mass unit)
  10. 10. Atomic Number  This number indicates the number of protons in an atom  The number of protons identifies the atom.
  11. 11. Neutrons  No charge  Found in the nucleus  Mass of 1 AMU (atomic mass unit)
  12. 12. Mass Number = protons + neutrons © Addison-Wesley Publishing Company, Inc.
  13. 13. Isotopes  Atoms of the same element with different mass numbers. 12 C Mass # Atomic # 6  Hyphen notation: carbon-12
  14. 14. It’s the Isotopes!
  15. 15. Periodic Table
  16. 16. Electrons •Negative Charge •Found in energy levels outside the nucleus •Mass of 1/1836 AMU (almost nothing!)
  17. 17. Ion Neutral atom - The number of electrons = number of protons. Ion - The number of electrons is different from the number of protons. (charged atom)
  18. 18. PRACTICE PROBLEMS 15 N 7 8 7 # protons = ____ # neutrons= ____ #electrons = ___ P 35 15 # p = ____ 20 # n= ____ 15 #e- = ___ Cu2+ 62 27 29 # p = ____ 33 # n= ____ #e- = ___ Se 76 3- 34 42 37
  19. 19. Learning Check Naturally occurring carbon consists of three isotopes, 12 C, 13C, and 14C. State the number of protons, neutrons, and electrons in each of these carbon atoms. 12 C 13 C 14 C 6 6 6 #p _______ _______ _______ #n _______ _______ _______ #e _______ _______ _______
  20. 20. Solution 12 C 13 C C 14 6 6 6 #p 6 6 6 #n 6 7 8 #e 6 6 6
  21. 21. Quick Review:  The three subatomic particles are proton, neutron and electron  Protons are positively charged, electrons are negative, neutrons are neutral  When an electron is lost or gained, the atom becomes an ion.
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