Electronic configuration definitions

Question 1

Relative atomic mass

Answer 1

The weighted mean mass of an atom compared to 1/12 of the mass of an atom of carbon-12

Question 2

Relative isotopic mass

Answer 2

The mass of an individual atom of a particular isotope relative to 1/12 of the mass of an atom of carbon-12

Question 3

Molecular ion peak

Answer 3

Peak with the highest m/z ratio in the mass spectrum, the M peak

Question 4

Quantum shell

Answer 4

Defines the energy level of a shell

Question 5

Orbital

Answer 5

Region within an atom that can hold up to two electrons with opposite spins

Question 6

Electronic configuration of an atom

Answer 6

Shows the number of electrons in each sub level in each energy level of the atom

Question 7

Hund’s rule

Answer 7

states that electrons will occupy the orbitals singly before pairing takes place

Question 8

Pauli’s exclusion principle

Answer 8

States that two electrons cannot occupy the same orbital unless they have opposite spins.

Question 9

Relative mass of an electron

Answer 9

1/1840