The Curiosity rover now on Mars analyzed rocks and found magnesium to have the following isotopic composition. What is the average atomic mass of magnesium in these rocks? 
A) 24.31 u
B) 24.29 u
C) 24.33 u
D) 24.99 u
E) 33.33 u
Correct Answer:
Verified
Q29: What is the symbol for magnesium?
A)M
B)Mg
C)Mn
D)Mo
E)Ma
Q30: Which of the following is an alkaline
Q31: Zinc has five naturally occurring isotopes with
Q32: Enriched weapons-grade uranium consists of 80% uranium-235
Q33: An unknown element is found to contain
Q35: What is the symbol of the ion
Q36: He is the symbol for _
A)hydrogen.
B)hafnium.
C)mercury.
D)helium.
E)holmium.
Q37: There are three major isotopes of silicon:
Q38: Ca is the symbol for _
A)cesium.
B)cobalt.
C)cadmium.
D)calcium.
E)cerium.
Q39: A hypothetical element has two stable isotopes:
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