What is the electron configuration for calcium 4

What is the electron configuration for calcium? ____________________________________
4. Arrange : Click Next element and add an electron for scandium. Try different orbitals until
you find the right one.
What is the electron configuration for scandium? __________________________________
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5. Observe : Scandium is the first element to contain electrons in the d subshell. How many
orbitals does the d subshell have, and how many electrons can fit in the d subshell?
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6. Infer : Select the PERIODIC TABLE tab. The middle section of the table is a chemical family
called the transition metals. Why do you think this section is ten columns wide?
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C
Activity C (
7. Make a rule : The diagonal rule explains which subshell will be
filled next. To follow the diagonal rule, move down along an
arrow until you reach the end of the arrow. Then move to the
start of the next arrow to the right.
A. Which subshell is filled after 4 p ? __________
B. Which subshell is filled after 6 s ? __________
C. Which subshell is filled after 5 d ? __________
8. Practice : Determine the electron configurations of the following elements. Use the Gizmo to
check your work. (Note: In some cases, the diagonal rule doesn’t work perfectly. If you
submit a theoretically correct configuration, the Gizmo will give you the actual configuration.)
Element Atomic number Electron configuration
Cobalt (Co) 27 _________________________________________
Germanium (Ge) 32 _________________________________________
Yttrium (Y) 39 _________________________________________
Neodymium (Nd) 60 _________________________________________
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Gold (Au) 79 _________________________________________

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9. Infer : Select the PERIODIC TABLE tab. Earlier you saw that the transition metals represent
the filling of the d subshells. Now locate the purple lanthanides and actinides on the bottom
rows of the periodic table.
A. How many elements are in the in the lanthanides series? _____________________
B. Which subshell is represented by the lanthanides family? _____________________
C. Which subshell is represented by the actinides family? _______________________
D. In general, how is the shape of the periodic table related to electron configurations?
(If necessary, continue your answer on another sheet of paper.)
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