Chapter 2 - Chapter 2 1. Identify the six elements that...

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Chapter 2 1. Identify the six elements that make up 95% of living organisms. C Carbon H Hydrogen N Nitrogen O Oxygen P Phosphorus S Sulfur 2. List the subatomic particles within an atom, know where each if found, and what the charge for each is. Protons (positively charged) Neutrons (uncharged) Electrons (negatively charged) 3. Describe the number of electron shells that would present among a given atom and the number of valence electrons (outer shell electrons) each would have. The first electron shell has 2 electrons. The second and any electron shell after that has 8 electrons. 4. Compare an elements atomic mass and atomic number. Atomic Mass = Number of Protons + Number of Neutrons Atomic Number = Number of Protons 5. Define what an isotope is and list the carbon isotopes. Atoms of the same element with a differing numbers of neutrons *Changes the Atomic Mass Carbon 12 Carbon 13 Carbon 14 (radioactive) 6. Compare molecules and compounds. Molecules form when two or more atoms bond together (example: O 2 ) Compounds form when two or more different elements bond together (H 2 O) 7. List the three different types of chemical bonds discussed and describe each. Know which atoms would form which type of bond and why. Ionic Bonding Ions are charged particles that form when electrons are transferred from one atom to another Ionic compounds are held together by an attraction between oppositely charged ions called an ionic bond Covalent Bond In covalent bonds, atoms share electrons allowing each atom to have a completed outer
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Chapter 2 - Chapter 2 1. Identify the six elements that...

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