Intro to chem
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Intro to chem

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Intro to chem Intro to chem Presentation Transcript

  • Introduction to Basic Chemistry
  • I. Building Blocks of Matter:
    MATTER is made up of the smallest BASIC particle called an ATOM
    (matter is anything that has mass…pretty much everything around you)
    • Atoms have 2 main parts:
    NUCLEUS: central region that contains protons & neutrons
  • ENERGY LEVEL or ELECTRON CLOUD: area outside the nucleus that contains the electrons
    • Made up of 3 kinds of subatomic particles
    PROTONS: positive charge
    NEUTRONS: neutral (no charge)
    ELETRONS: negative charge
  • II. Properties of Atoms
    Atoms are electrically NEUTRAL
    Number of ELECTRONS is equal to the number of PROTONS
  • 2. In nature, atoms will BOND to other atoms to become stable
    ELECTRONS are part of why atoms bond together
  • There are 2 types of electrons
    CORE and VALENCE electrons:
    ***Valence Electrons: OUTSIDE electrons
    that are involved in bonding.
  • 3. BONDING: an attraction within atoms to form a chemical compound
    All atoms are electrically neutral but are UNSTABLE until they form an attraction with another atom
    The outermost energy level may SHARE, LOSE, or GAIN electrons to form a BOND and become stable
  • Two types of bonds found within atoms:
    1. Covalent: Atoms share electrons (can be single, double, or triple)
  • Two types of bonds found within atoms:
    2. Ionic: When one or more electrons is lost from one atom and transferred to another