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Chapter 3: Problem 32
Calculate the number of protons of the atom whose mass number is 19 and whose number of neutrons is 10.
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Write the electron configuration for nickel, whose atomic number is \(28 .\) Remember that the 4\(s\) orbital has lower energy than the 3\(d\) orbital does and that the \(d\) sublevel can hold a maximum of 10 electrons.
Of the five parts of Dalton's atomic theory, which one (s) have been modified?
The element sulfur has an electron configuration of 1\(s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{4}\) . \begin{equation} \begin{array}{l}{\text { a. What does the superscript } 6 \text { refer to? }} \\\ {\text { b. What does the letter } s \text { refer to? }} \\ {\text { c. What does the coefficient 3 refer to? }}\end{array} \end{equation}
Calculate the number of atoms present in each of the following: \begin{equation} \begin{array}{l}{\text { a. } 2 \text { mol Fe }} \\ {\text { b. } 40.1 \text { g Ca, which has an atomic mass }} \\ {\text { of } 40.08 \text { amu }} \\\ {\text { c. } 4.5 \text { mol of boron-11 }}\end{array} \end{equation}
Predict what Rutherford might have observed if he had bombarded copper metal instead of gold metal with alpha particles. The atomic numbers of copper and gold are 29 and 79 , respectively.
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