1.2

Question 1

Quantum numbers

Answer 1

Address of an electron. Four numbers.

Question 2

Pams

Answer 2

Principle quantum number; angular momentum number; magnetic number; spin number

Question 3

Principle quantum number

Answer 3

N. The main energy level

Question 4

Angular momentum number

Answer 4

L. Shape of a subshell. Three types: S, 0 (circle); P, 1 (figure of eight); D, 2 (cross)

Question 5

Magnetic number

Answer 5

M1. Area where a probability of finding an electron is >90%. Orientation of orbital. Value between -l and +l

Question 6

Spin number

Answer 6

M2. Direction of spin. Either -1/2 of +1/2

Question 7

Pauli Exclusion principle

Answer 7

No two electrons in any one atom can have the same 4 quantum numbers

Question 8

Orbital

Answer 8

Subshells made of orbitals. Can hold at most 2 electrons, and only if the electrons have opposite spins

Question 9

Aufbau principle

Answer 9

When electrons are placed in orbitals, the energy levels are filled up in order of increasing energy

Question 10

Hund’s rule (bus)

Answer 10

Electrons fill orbitals singly and with parallel spins before pairing

Question 11

Special stability

Answer 11

There is a special stability associated with having an exactly half full electron sub shell