Multiple Choice
Gold makes up a very small percentage (0.0000004%) of the Earth's crust.Why, if gold has been mined for centuries, is 40% of the gold still present in the crust?
A) Only in recent years have humans been able to successfully extract gold from the crust.Previously, only gold blends were removed from the crust.
B) The Earth's crust has a very large mass.A lot of gold has been removed, but a lot remains.
C) Gold is easily recycled, so very little gold is mined each year.
D) It is too expensive to mine gold.
Correct Answer:
Verified
Correct Answer:
Verified
Q12: As can be classified as a<br>A)metal.<br>B)metalloid.<br>C)nonmetal.<br>D)gas.<br>
Q13: Identify which of the following elements is
Q14: The element symbols in a chemical formula
Q15: When a substance goes from the gas
Q16: Shown here is the structure for Vitamin
Q18: Why is the disposal method used for
Q19: Which of the following is classified as
Q20: Why is gold mining largely unnecessary?<br>A)Gold prices
Q21: Locard's principle states that<br>A)when two things come
Q22: On the periodic table, vertical columns are