It Is Relatively Easy to Pull an Electron Away from a Potassium

question 70

Multiple Choice

It is relatively easy to pull an electron away from a potassium atom (K, atomic number 19) , but very difficult to remove a second one because ________.

• A)of the repulsions occurring between electrons within the same shell
• B)the electrons are so very small
• C)of a much greater effective nuclear charge
• D)very little energy remains after the first electron is removed

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