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Which statement is NOT correct for an atom with an electron configuration of
1s22s22p63s23p5?
A. It has 17 electrons
B. It has 3 main energy levels.
C. The 3p orbitals are completely field.
D. The s orbitals are completely filled.
2. Which electron configuration below is correct?
A. 1s22s22p53s23p6
B. 1s22p63s23p3
C. 1s22s23s22p63p4
D. 1s22s22p63s23p4
3. Which is the correct configuration of P15 using the Hund’s Rule.
A. 1s2 2s2 2px
2 2py
2 2pz
2 3s2 3px
2 3py
1 3pz

B. 1s2 2s2 2px
2 2py
2 2pz
2 3s2 3px
1 3py
1 3pz
1

C. 1s2 2s2 2px
2 2py
2 2pz
2 3s2 3px
1 3py
1 3pz 4s1

D. 1s2 2s2 2px
2 2py
2 2pz
2 3s2 3px
1 3py 3pz
1 4s1

4. Write the electron configuration of Ca20 and show its orbital diagram.