Download Chapter 4: Modern Atomic Structure NOTES

Chapter 4: Modern Atomic Structure NOTES
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Atom
o Smallest particle of an element that retains the properties of that element
o Comes from the Greek word atomos, meaning indivisible
o Made up of 3 subatomic particles (electrons, neutrons, and protons)
Subatomic Particles
Subatomic Particle
Symbol
Relative Charge
Relative Mass
Electron
Proton
Neutron
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Periodic Table
o Atomic Number =
o Mass Number (Atomic Mass) =
o Symbols and Elements
 Element = Nickel
 Symbol =
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Symbol = Cr
 Element =
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Practice Problem #1: What the symbol for the element Mercury?
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Practice Problem #2: What is the element that has the symbol Ba?
o Oxygen (O)
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Atomic Number =
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Atomic Mass =
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# of protons =
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# of electrons =
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# of neutrons =
o Tin (Sn)
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Atomic Number =
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Atomic Mass =
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# of protons =
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# of electrons =
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# of neutrons =
Drawing of a Calcium Atom: