Isotopes and Ions • Practices Problems

  Problem #1 How many electrons are present in N 3- ? Problem #2 An isotope with the symbol 14 X 2+ has 5 neutrons.  How many electrons do...

 

Problem #1

How many electrons are present in N3- ?

Problem #2

An isotope with the symbol 14X2+ has 5 neutrons.  How many electrons does it have?

Problem #3

An isotope has the symbol  . How many neutrons does it have?

Problem #4

The isotope 137X has 75 electrons.  Determine the number of neutrons it has.

Problem #5

An isotope has the symbol  .  How many electrons does the isotope have?

Problem #6

Consider the element 75As.  Determine how many protons, electrons, and neutrons it has.

Problem #7 Consider the element Os with mass number of 90 and a charge of +2.
How many electrons are present in this ion?

Problem #8 Calculate the weighted-average atomic mass of Neon.  Given the isotopic abundance values below.

Problem #9 Find the weighted-average atomic mass of Ag if the abundance

of 107Ag is 51.839% and the rest is 109Ag.

Problem #10 The isotope 36X has 25 neutrons.  If a cation formed from this isotope contains 9 electrons,
what is the charge of this ion?

Problem #11 Consider the isotope 36Cl.  If a cation formed from this isotope contains 9 electrons,
what is the charge of this ion?

To learn how to solve these problems click below.

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