What does "X" represent in the following symbol? 
X
A) mercury
B) chlorine
C) scandium
D) bromine
E) selenium
Correct Answer:
Verified
Q4: The atomic mass for cadmium is _.
A)48
B)112.41
C)40.08
D)20
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A)
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A) that all elements
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Q43: Calculate the atomic mass of element "X",if
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