What does "X" represent in the following symbol? 
A) mercury
B) chlorine
C) scandium
D) bromine
E) selenium
Correct Answer:
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Q3: In a chemical reaction, matter is neither
Q8: Determine the number of protons, neutrons, and
Q9: If 26.0 g of water, H2O ,
Q9: Determine the number of protons, neutrons, and
Q11: What does "X" represent in the following
Q12: Identify the charges of protons, neutrons, and
Q12: Which of the following is an example
Q18: All samples of a given compound, regardless
Q19: If 6.0 g of carbon combines with
Q20: The mass number is equal to
A) the
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