Unit 2 – Chemistry of Life



Define matter – What is an element?Elements of Life Fill in the table regarding the six elements of life.Element% of Body MassExample in BodyOrganization of Life51816001016000Define an atom –Label each of the parts of the atom on the diagram to the right. Fill in this table regarding the parts of an atom.ParticleChargeFunction in AtomHow does the mass of an electron compare to neutrons and protons?Neutral atoms always have ( the same / different ) numbers of protons and electrons.Why is the electron cloud model considered more accurate?Why is the electron-shell model used more often in textbooks?What are the two inaccuracies of the electron-shell model?Label the parts of the helium entry from the periodic table.What does the atomic number of an element tell you?What does the atomic mass of an element tell you?Define an ion –Give four examples of ions found in the human body: Define a molecule –Define a compound –How do the properties of compounds compare to their constituent elements?Define a mixture –Which electrons in an atom are valence electrons?What is the octet rule?Explain how an ionic bond is formed.Explain how a covalent bond is formed.Draw each type of covalent bond, and indicate how many electrons are shared within each.Single:Double:Triple:What does it mean to be a polar molecule?Define a hydrogen bond –Describe each property of water:Cohesion –Adhesion –Heat Capacity –Universal Solvent –Acids are solutions with higher amounts of ____________ ions.Bases are solutions with higher amounts of ____________ ions.What does pH measure?Label the acid, base, and neutral part of this pH scaleWhat does it mean that the pH scale is logarithmic? ................
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