Lesson 10

Question 1

Aufbau principle

Answer 1

States that in the ground state of an atom or ion, electrons fill subshells of the lowest available energy, then they fill subshells of higher energy. For example, the 1s subshell is filled before the 2s subshell is occupied.

Question 2

Hunds rule

Answer 2

every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin.

Question 3

Pauli exclusion principle

Answer 3

no two electrons in the same atom can have identical values for all four of their quantum numbers. In other words, (1) no more than two electrons can occupy the same orbital and (2) two electrons in the same orbital must have opposite spins

Question 4

Electron configuration

Answer 4

According to this principle, electrons are filled in the following order: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p…

Question 5

Ground state

Answer 5

the lowest energy state of an atom or other particle.

Question 6

Condensed electron figuration: EX: C

Answer 6

[He] 2s2 2p2

Question 7

Electron configuration EX: Ca

Answer 7

1S2 2S2 2P6 3S2 3P6 4S2