Section 3 - Chemistry
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Section 3 - Chemistry






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    Section 3 - Chemistry Section 3 - Chemistry Presentation Transcript

    • The Chemistry of Life Biology I Factoids
    • Factoid #1
      • All living things must be able to adapt, get and use energy, respond to stimulus, reproduce, have DNA, grow and develop, and be made up of cells.
    • Factoid #2
      • Atoms are made up of protons, neutrons, and electrons.
    • Factoid #3
      • Protons and Neutrons are found in the nucleus and electrons are found orbiting the nucleus.
    • Factoid #4
      • Protons have a positive charge, electrons have a negative charge, and neutrons have no charge.
    • Factoid #5
      • The periodic table is a list of known elements that include the metals, non-metals, and metaloids.
    • Factoid #6
      • The atomic number, that is found on the periodic table, is the number of protons in the that atom.
    • Factoid #7
      • In a neutral atom the number of protons equal the number of electrons.
    • Factoid #8
      • Two electrons will fit in the first energy level and eight electrons will fit in the 2 nd and 3 rd levels.
    • Factoid #9
      • Atoms form bonds in order to have full, stable outer energy level.
    • Factoid #10
      • The three types of bonds are hydrogen, ionic, and covalent bonds.
    • Factoid #11
      • Hydrogen bonds are very weak bonds between hydrogen atoms.
    • Factoid #12
      • When electrons are gained, lost, or transferred, the atom becomes either a positive or negative ion and an ionic bond forms.
    • Factoid #13
      • When electrons are shared between atoms a covalent bond forms.
    • Factoid #14
      • Large molecules and atoms bonded to itself are covalent.
    • Factoid #15
      • The chemical formula for water is H 2 O.
    • Factoid #16
      • Water is the universal solvent, a temperature stabilizer, and can form ions.
    • Factoid #17
      • Adhesion is when water sticks to other surfaces and cohesion is when water sticks to other water molecules.
    • Factoid #18
      • Water forms a polar covalent bond with the hydrogen side slightly positive and the oxygen side slightly negative.
    • Factoid #19
      • Water will split into H+ and –OH.
    • Factoid #20
      • The pH scale goes from 0-14;
      0 14 7 A c i d s B a s e s
    • Factoid #21
      • The more H+ in a solution, the more acid a solution is.
    • Factoid #22
      • When the –OH is equal to the H+, the solution is neutral (pH 7).
    • Factoid #23
      • The lower the pH the stronger the acid and the higher the pH the stronger the base.