Homework Due July 11th 2013

26-34 pg. 132-133

26. Metals are more likely to lose electrons.

27. They are unreactive. 

28. A. Cation
       B. Cation
       C. Anion
       D. Cation
       E. Anion
       F. Cation
       G. Anion
       H. Cation

29. Oxygen with mass number 16 and oxygen with mass number 18 because mass numbers are close together than ions and metals.

30. 206 pm.

31. A. change in color: For a physical cause the changing of a color does effect physical       properties and in a chemical reaction  a color change shows the reaction is occurring.
      B. temperature change: Chemicals cause the temperature to rise or decrease; it physical changes due to the new temperature.
      C. formation of a gas: Chemical reactions cause gas to form; this physically alters the substance..?

32. A. Bromine (Br)
      B. Silicon (Si)

33. Both look at the use of ions, both were based on predictions, and both predictions changed over time. 

34. Put cobalt (Cu) after nickel (Ni). Put uranium (U) after neptunium. 

1-8 pg. 151

1. Hydrosphere and Lithosphere. 

2. A. Crust (at the top), Mantle (silicates of Mg and Fe), and Core (2900 km to Earth's center). 
    B. Lithosphere's crust.

3. A. Mexico
    B. Japan
    C. China

4. Brazil

5. Minerals are naturally occurring solid compounds that contain the element or group of elements of interest while ores are naturally occurring rock or mineral that can be mined and from which it is profitable to extract a metal or other material.

6. The quantity of useful ore found at the site, the percent of metal in the ore, the type of mining and processing needed to extract the metal from its ore, the distance between the mine and metal-refining facilities and markets, the metal's supply-versus-demand status, and the environmental impact of the mining and metal processing.

7. More minerals (gold) may have been found.

8. Ore that is in good use; ore that is available for future use.