Example 1: Complete the following table, assuming that a has a mass of 12 amu and “Small Atom” that a has a mass of 14 amu. “Large Atom” % abundance % abundance Average Number of Number of of of Atomic Mass “Small “Large “Small Atoms” “Large Atoms” (amu) Atoms” Atoms” Example 2: Boron has 2 isotopes, B-10 and B-11. The % abundance of B-10 is 19.78%. What is the average atomic mass of boron? How do we know the percentage abundance for each isotope of each element? Unequal Numbers of Protons and Electrons: Ions In terms of electrons in energy levels, what is special about the noble gases? How is the overall energy state of noble gases affected by this? As a result, every atom to be as much like a noble gas as possible. “wants” Why every atom be a noble gas? can’t How could an element be similar to a noble gas?
Example 1: Complete the following table, assuming that a “Small Atom” has a mass of 12 amu and that a “Large Atom” has a mass of 14 amu. Number of “Small Atoms” Number of “Large Atoms” % abundance of “Small Atoms” % abundance of “Large Atoms” Average Atomic Mass (amu) Example 2: Boron has 2 isotopes, B-10 and B-11. The % abundance of B-10 is 19.78%. What is the average atomic mass of boron? How do we know the percentage abundance for each isotope of each element? Unequal Numbers of Protons and Electrons: Ions In terms of electrons in energy levels, what is special about the noble gases? How is the overall energy state of noble gases affected by this? As a result, every atom “wants” to be as much like a noble gas as possible. Why can’t every atom be a noble gas? How could an element be similar to a noble gas?
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