26. Metallic elements are more likely to lose electrons.
27. Noble gases are not reactive and are chemically inert.
28. a. cation
b. cation
c. anion
d. cation
e. anion
f. cation
g. cation
h. anion
29. Copper metal and copper (II) ions are more chemically similar because there is only a slight difference of the absence of two electrons.
30. 205 pm.
31. Change in color
- Chemically: rust
- Physically: painting or coloring the substance
Change in temperature
- Chemically: combustion
- Physically: boiling/melting
Formation of a gas:
- Chemically: reaction of HCl and Cu
- Physically: water evaporation
32. a. Bromine (Br)
b. Silicon (Si)
33. In the Snake River fish-kill mystery, we had the masses to substances with known normal masses. We had to use the information given to test our basic knowledge and create a logical hypothesis.
34. Cobalt would have to be placed after nickel, and argon after potassium.
2SBS:
1. Atmosphere- Nitrogen, oxygen, neon, and argon
Hydrosphere- Water and dissolved minerals
Lithosphere- Petroleum and metal-bearing ores
2. A major part of the lithosphere are ores, which most importantly contain minerals. Minerals are naturally occurring solid compounds that contain elements of interest.
3. a. silver- Mexico
b. copper- Japan
c. tin- China
4. China produces the largest masses of the eight listed resources in the table.
5. Minerals are naturally occurring solid compounds containing the element, whereas ores are naturally occurring rocks or minerals that can be mined and are profitable to extract a metal.
6. The percent of metal in the ore, the quantity of useful ore found at the site, and the type of mining and processing needed to extract the ore are some factors that determine the feasibility of mining a metallic ore at a site.
7. At the time that the mine was reopened, the value of gold could have dramatically increased and become an element of high interest.
8. "Useful ores" refer to the percent or amount of the desired mineral being mined.
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