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.