Chapter 4 Practice Skills

Chapter 4 Practice Skills Name______

Arrangement of Electrons in Atoms

1. Identify each of indicated the elements:

a) 1s22s22p63s23p4

b) [Ar] 3d64s2

c) [Rn]5f77s2

d) contains 6 electrons in its fifth and outer main energy level

e) contains 3 electrons in its electron dot symbol in and has a principal quantum number of 4.

f) has 18 inner shell electrons and 1 outer shell electron

2. a) Identify the element that has 4 electrons in the p sublevel in its sixth main energy level. (6s26p4)

b) What is the total number of electrons in the sixth main energy level for atoms of this element?

c) Write the electron dot diagram for this element.

d) Name the element in the third period with the same number of outermost electrons.

3. How many electrons can each of the following main energy levels hold?

a) n = 1 b) n = 3 c) n = 5

4. The fact that the 4s sublevel fills before the 3d sublevel is an example of (a) the Aufbau Principle; (b) Hund’s Rule; (c) The Pauli Exclusion Principle; (d) line emission spectrum

5. The fact that nitrogen has 3 unpaired electrons is an example of (a) the Aufbau Principle; (b) Hund’s Rule; (c) The Pauli Exclusion Principle; (d) line emission spectrum.

6. How many unpaired electrons does Iodine have?

7. Draw the electron dot diagram for the following elements:

a) Se b) Pb c) P

8. How many inner shell electrons do the following elements have?

a) Se b) Pb c) P

9. List the order in which orbitals fill, from the 1s to the 7p orbital.

10. Draw the orbital notation for each of the following:

a) Be+2

b) Mn

11. Draw the Noble gas orbital notation for each of the following:

a) Re b) Pm

12. Write the electron configuration for each of the following:

a) Be+2

b) Mn

13. Write the Noble gas electron configuration for each of the following:

a) Re

b) Pm