Final Exam Questions With Correct Answers

The symbol for xenon (Xe) would be a part of the noble gas notation for the element {Ans: A. antimony. B. cesium. C. radium. D. uranium. B. cesium}The table below gives the data that is needed to calculate the average atomic mass of element B. Isotope Atomic mass (amu) Relative abundance (%) B-10 10.01 19.91 B-11 11.01 80.09 Based on these data, what is the average atomic mass of element B? {Ans: A. 10.01 B. 10.51 C. 10.81 D. 11.01 C. 10.81}A chemical equation can be used to solve stoichiometry problems provided that is {Ans: A. indicates only the forward reaction and not the reverse B. indicates that reactants are in the gas phase and are not solids or liquids C. includes the coefficients that are needed for balancing the equation D. includes the state of matter for each substance C. includes the coefficients that are needed for balancing the equation}Who reported four "element" classifications, but included some substances that were combinations of elements rather than true elements in his listing? {Ans: A. Henry Moseley B. Dmitri Mendeleev C. Antoine Lavoisier D. Johann Dobereiner C. Antoine Lavoisier}Based on its location in the periodic table, what can