Chapter 8 Elctron Configuration And Periodicity

Question 1

Pauli Exclusion Principle

Answer 1

An orbital can hold at most two electrons, and then only if the electrons have opposite spins.

Question 2

Building-up principle/Aufbau Principle

Answer 2

A scheme to reproduce the electron configurations of the ground states of atoms by successively filling shells with electrons in a specific order (building-up) order.

Question 3

Valence electron

Answer 3

An electron in an atom outside the noble gas core and pseudo noble gas core. Usually involved in chemical reactions.