Phoenix College - CHM 130 Essay Question 1) Arrange the following elements in order of increasing (from smallest to largest) atomic size: K, O, Cs, Se

English Mar 15, 2021

Phoenix College - CHM 130

Essay Question 1) Arrange the following elements in order of increasing (from smallest to largest) atomic size: K, O, Cs, Se. Explain the reasoning behind your chosen order. Do not simply restate the trend, but rather explain why the trend exists.

Essay Question 2 - Potassium has three naturally occurring isotopes. According to one source of data, Potassium-39 (mass 38.9637 amu) makes

up 93.26%, potassium-40 (mass 39.9640 amu) makes up just 0.01%, and potassium-41 (mass 40.9618 amu) makes up 6.73%. What is the average atomic mass of potassium based on these relative abundances? Show all your work for credit and express your final answer to 2 decimal places and include the unit.

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