Multiple Choice
Heavy elements like Pb (lead) and U (Uranium) were generated ________.
A) by humans in nuclear reactors
B) during the big band when the universe was formed
C) by the Sun and expelled to the solar system via the solar wind
D) during collapse of a star and subsequent nuclear synthesis in a supernova
Correct Answer:
Verified
Correct Answer:
Verified
Q20: Which common mineral is composed entirely of
Q21: Many metals are extracted from ores that
Q22: What does the tendency of micas to
Q23: Which one of the following mineral groups
Q24: Quartz has a characteristic conchoidal fracture,yet rock
Q26: Carbonates always include _.<br>A)SiO4-4<br>B)SO4-2<br>C)CO3-2<br>D)Cl-1,F-1,or Br-1
Q27: The physical property denoting a mineral's tendency
Q28: Atoms that have an electrical charge due
Q29: Dark Silicates have a specific gravity of
Q30: In the late 20th century most metal