lesson 1

Question 1

The discovery of this person showed that there were more fundamental particles present in the atoms

Answer 1

J.J Thomson

Question 2

This person that most of the mass of an atom resides in a tiny nucleus whose radius is 100,000 times
smaller than that of an atom.

Answer 2

Rutherford

Question 3

He theorized that light bears were made of photons that are equivalent to particles of wave motion.

Answer 3

Max Planck

Question 4

Based on the Heisenberg uncertainty principle, electrons do not travel around the nucleus in neat orbits. Instead,
they exist in certain regions called _____

Answer 4

orbital

Question 5

This theory gives good interpretations of the

phenomena of the atomic and subatomic world.

Answer 5

quantom theory

Question 6

indicates the main energy level occupied by the electron. This quantily is
sometimes referred as the shells.

Answer 6

Principal Quantum Number (n)

Question 7

indicates the shape of the orbital. This corresponds to the

subshells that may exist on each energy level.

Answer 7

Angular Momentum Quantum Number ()

Question 8

indicates the orientation of an orbital around the nucleus.

Answer 8

Magnetic Quantum Number (ml)

Question 9

indicates the magnitude of the momentum and direction of an atom.

Answer 9

Spin Quantum Number (ms)

Question 10

is the arrangement of the electrons in an atom.

Answer 10

Electron Configuration

Question 11

this is the most common representation when electron configuration is
being discussed.

Answer 11

Electron Configuration Notation

Question 12

This representation utilizes either a line or a box. Each line or box would represent one
orbital which shows the spin of each electron.

Answer 12

Orbital Notation

Question 13

• this rule dictates the order in which electrons occupy orbitals. According to this
  principle, an electron occupies the lowest-energy orbital that can receive it.

Answer 13

AUFBAU PRINCIPLE

Question 14

This second rule reflects the importance of the spin quantum number. It states that
no two electrons in the same atom can have the same set of four quantum numbers.

Answer 14

Pauli Exclusion Principle

Question 15

This third rule requires placing as many unpaired electrons as possible in separate orbitals in
the same sublevel. This rule states that orbitals of equal energy are each occupied by one electron before any
orbital is occupied by a second electron, and all electrons in singly occupied orbitals must have the same spin.

Answer 15

Hund’s Rule

Question 16

unpaired electrons

Answer 16

paramagnetic

Question 17

paired electrons

Answer 17

diamagnetic