Download 5.2 Electrons in Atoms Section Review Word Bank for Questions 1

5.2 Electrons in Atoms
Section Review
Word Bank for Questions 1-7
two
electron configuration
equal Chromium
opposite
a single electron
Pauli Exclusion Principle
superscripts
Aufbau Principle
1. The ways in which electrons are arranged around the nuclei of atoms are
called_____________.
2. The _____________describes the sequence in which orbitals are filled.
3. The various orbitals within a sublevel of a principle energy level are
always of ________energy.
4. The ___________________principle states that a maximum of only
_________ electrons can occupy each orbital.
5. To occupy the same orbital, two electrons must have _____________
spins. Hund’s rule states that the electrons pair up only after each orbital
in a sublevel is occupied by ___________ .
6. When using the shorthand method for showing the electron
configuration of an atom, ___________are used to indicate the number
of occupying each sublevel.
7. Correct electron configurations can be obtained by using the Aufbau
diagram for the elements up to and including vanadium.
_____________ and copper are exceptions to the Aufbau principle.
Circle the word or phrase that makes the sentence TRUE.
8. The orbitals of a principal energy level are (always / sometimes) lower in energy than
the orbitals in the next higher principal energy level.
9. The more stable electron configuration is (3d44s2 / 3d54s1).
10.
As many as (four/two) electrons can occupy the same orbital.
11. The Pauli exclusion principle states that an atomic orbital may describe
at most two electrons/ electrons pair up only after each orbital in a sublevel is
occupied by a single atom.
12. The electron configuration for potassium is 1s22s22p63s23p64s1 or
1s22s22p63s23p64s2.
13. The electron configuration for copper is 1s22s22p63s23p64s23d9 or
1s22s22p63s23p64s23d9 .
electron configuration
Aufbau principle
Pauli exclusion principle
Hund’s rule
_______________14. When electrons occupy orbitals of equal energy, one electron enters each
orbital until all the orbitals contain one electron with parallel spins.
_______________15. An atomic orbital may describe at most two electrons.
_______________16. Electrons enter orbitals of lowest energy first.
_______________17. The most stable arrangement of electrons around the nucleus of an atom
18. Write the electron configurations for the following atoms.
a. N
c. Ca
b. Cl
d. Ar
19. Identify the elements described below:
a. Contains a full third energy level.
b. Contains the first p electron.