Electronic Configuration and Quantum Numbers

Question 1

• States that it is impossible to measure accurately both position and momentum of a particle simultaneously

Answer 1

Heisenberg Uncertainty Principle

Question 2

The arrangement of electrons in atomic orbitals

Answer 2

Electron configuration

Question 3

________ helps determine the electron configuration

Answer 3

Aufbau Principle

Question 4

Maximum number of electrons per subshell?

Answer 4

• s (sharp) – 2e-
• p (principal) – 6e-
• d (diffuse) – 10e-
• f (fundamental) – 14e

Question 5

According to this principle, each orbital can hold up to two electrons with their spins in opposite directions (paired)

Answer 5

Pauli’s Exclusion Principle

Question 6

each orbital in a subshell is half-filled (with one electron) before any orbital becomes completely
filled (with two electrons)

Answer 6

Hund’s Rule

Question 7

This diagram show orbitals as boxes and electrons as arrows

Answer 7

Orbital diagram

Question 8

_____ of a substance may be identified by checking its electron configuration

Answer 8

Magnetic Property

Question 9

unpaired electrons (attracted to magnetic field)

Answer 9

Paramagnetic

Question 10

paired electrons (unaffected by the magnetic field)

Answer 10

Diamagnetic

Question 11

the electron configuration starts with the symbol of the noble gas in the previous period, followed by the additional configuration of the electrons for the given element.

Answer 11

Noble Gas Configuration

Question 12

• Describe the location of an electron in an atom
• Specify the properties of atomic
  orbitals and the electrons

Answer 12

Quantum Numbers

Question 13

• Four quantum numbers

Answer 13

• Principal
• Angular Momentum
• Magnetic
• Spin

Question 14

regions where electrons may be found (main energy level (n=1,2,3,4…))

Answer 14

Principle Quantum Number

Question 15

signified as (l), specifies the orbital shape or region of an electron occupies.

Answer 15

Angular Momentum or Azimuthal Quantum Number

Question 16

What are the quantum numbers assigned per subshell in angular momentum?

Answer 16

• s = 0
• p = 1
• d = 2
• f = 3

Question 17

: describes the orbital orientation in space. Electrons can be situated in one of three planes in three-dimensional space around a given nucleus (x, y and z)

Answer 17

Magnetic Quantum Number (m1)

S = 0
p = -1, 0, 1
d = -2, -1, 0, 1, 2
f = -3, -2, -1, 0, 1, 2, 3

Question 18

Describes the spin for a given electron. An electron can have one of the two associated spins; + ½ or - ½. It is also represented with arrows.

Answer 18

Spin Quantum Number (𝑚𝑠)

In the orbital diagram, if the last arrow is:
* pointing up, ms = +1/2
* pointing down, ms = -1/2

Question 19

outermost electrons in an atom
(involved in chemical bonding). The noble gases (inert) are extremely stable due to complete valence electron in the outermost s and p subshells.

Answer 19

Valence electrons

Question 20

elements usually react to attain the electron configuration (8 ve-) of the noble gas closest to them in the periodic table. Atoms will
gain, lose or share electrons in chemical reactions to achieve stable energy.

Answer 20

Octet rule