Homework 7/10

Page 132 #26-34

26. Nonmetallic elements are more likely to lose the electrons.

27. Noble Gases are nonreactive and extremely stable.

28. A) Cation

B) Cation

C) Anion

D) Anion

E) Anion

F) Cation

G) Cation

H) Anion

29. A) the difference between copper metal and copper ions is that 2 electrons are absent. When neutrons change it is much larger than if electrons change because of the major size difference.

30. 156+254=410

410/2=205 pm is the diameter

31. A) Chemical Cause: rusting and changing color because of oxygen

Physical Cause: luster or coloring changes the elements appearance

B) Chemical Cause: Combustion is heating up

Physical Cause: Boiling point or freezing point

C) Chemical Cause: Acid reaction

Physical Cause: water vapor occurs after boiling

32. A) Bromine

B) Silicon

33. We compared mass changes in the different substances we tested for with normal masses. We knew the properties of the different substances and we created valid and reasonable hypotheses.

34. Argon (40) is supposed to be after potassium and Cobalt (59) would need to be after nickel in order for this to work.

Page 151 #1-8

1. Atmosphere: nitrogen and oxygen

Hydrosphere: water and dissolved minerals.

Lithosphere: petroleum and metal-bearing ores.

2. A) The crust which is top the thin band of soil and rock containing major raw materials needed to build all manufactured objects, the mantle which is the middle layer of the lithosphere, and the core which is Earth's rock center.

B) The crust is the most important because it is where human live and it is the main storehouse of chemical resources.

3.A) Mexico

B) Japan

C) China

4. China

5. Ores are natural rocks or minerals that can be mined and are profitable. Minerals are natural solid compounds containing the element or group of elements of interest.

6. The quantity of useful ore found at the site, the percent of metal in the ore, and the type of mining and processing needed to extract the metal from its ore are all factors.

7. It is possible that the gold has been replaced over time because it used to be extremely popular.

8. The “useful ore” is referring to the anticipated mineral that is being mined.