List the three members of the atoms family. · Essential Question: What is an atom made of? Warmup:...
Transcript of List the three members of the atoms family. · Essential Question: What is an atom made of? Warmup:...
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Atomic Structure Essential Question: What is an atom made of?
Warmup:
List the three members of the atoms family.
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Atom Structure -Two major parts
1. Nucleus (small!)
2. Electron Cloud
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Scale of an atom
1) Describe the relative size of the nucleus in relation to the whole atom
2) Describe your own analogy of the atom.
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SUBATOMIC PARTICLES
• Protons • Neutrons • Electrons
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THE PROTON
p+ • Fat
(heavy; 1atm)
• Positive (charge)
• Doesn’t move (lazy)
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A large particle with a positive charge in the
nucleus
1. PROTON (p+)
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THE NEUTRON
n° • Fat
(heavy; 1atm)
• Neutral (charge)
• Doesn’t move (lazy)
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A large particle with a neutral charge in the nucleus
2. NEUTRON (n°)
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THE ELECTRON • Skinny
(very light)
• Negative (charge)
• Moves a lot (runs around)
e-
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A very small particle with a negative
charge in a “cloud” around the nucleus
3. ELECTRON (e-)
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Review: Subatomic Particles (Video)
e- n° p+
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Subatomic Particle Summary Table
Protons Neutrons Electrons
Where are they found?
Mass
Charge (attitude)
Nucleus Nucleus Electron Cloud
Heavy (1 amu)
Heavy (1 amu)
Very Light (0 amu)
Positive Neutral Negative
Symbol p+ n0 e-
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NUCLEUS: READ THE PASSAGE • The nucleus contains the PROTONS and
the NEUTRONS.
• It is the MOST DENSE part of the atom even though its diameter compared to the size of the atom is TINY!
• The nucleus determines the MASS of the atom, because the protons and the neutrons each weigh 1 atm (atomic mass unit).
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NEXT Complete the
1. DRAWING OF YOUR ATOM 2. INDEPENDENT PRACTICE worksheet
When you are done, you may work on the
following: • Completing the 3.1 ORGANIZER • CHEMISTRY VOCABULARY JOURNAL - you will be allowed to use this on your quizzes and (some of)
your exams