Inside an Atom Chapter 2, Section 1

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Inside an AtomChapter 2, Section 1

• What is the structure of an atom?
• What role do valence electrons play in chemical
  bonding?

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I. Atomic Structure

• A. An atom consists of a ___________________
  surrounded by one or more _______________.
• B. Whats in the nucleus?
• 1. Positively charged ____________
• 2. Neutrally charged ______________
• C. Surrounding the nucleus are negatively charged
  ________________________

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Ill have a lot to say about the size of this
atom (it is not NEARLY a scale model!), and also
about what LOOKS like little electrons orbiting
around the nucleus like little planets orbiting a
sun (they dont really do that).
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II. Electrons in Atoms

• A. Electrons are located at specific distances
  from the nucleus in an area called the
  _____________ __________________.
• 1. You can never know exactly where the
  electron is. Its movements are pretty random.
• 2. Between the electron and the nucleus is
  EMPTY SPACE!
• 3. In fact, most of the volume of an atom is
  made up of _____________ ______________!!

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II. Electrons in Atoms (cont.)

• B. The electrons farthest from the nucleus are
  called the ___________ _________.
• 1. These are the only electrons involved in
  forming ___________ with other atoms.
• 2. These are the electrons that determine if and
  how atoms bond with other atoms.

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III. Why Atoms Form Bonds

• A. A chemical bond forms between two atoms when
  ______________________________.
• B. These electrons can either be
• 1. ______________________________ 2.
  ______________________________