Electronic Theory of Valency: The Key to Bond Formation

The video explains the electronic theory of valency proposed by Kozel and Levis in 1916, focusing on the stability of noble gases. Noble gases like helium, neon, and others are stable due to their electron configurations, which prevent them from forming polyatomic molecules. The video details the electron configurations of noble gases, particularly neon, and introduces the concepts of octet and duplet configurations, highlighting their role in the stability of these elements.

Who proposed the electronic theory of valency in 1916?

• Kozel and Levis

• Curie and Becquerel

• Bohr and Rutherford

• Einstein and Planck

Why are noble gases like neon considered stable?

• They have more protons than electrons.

• They have a high tendency to form compounds.

• They have a full valence shell with 8 electrons.

• They have incomplete valence shells.

What is the electronic configuration of neon?

• 1s2 2s2 2p6

• 1s2 2s2 2p4

• 1s2 2s2 2p3

• 1s2 2s2 2p5

What is the term used to describe the stability of noble gases due to their electronic configuration?

• Triplet state

• Singlet state

• Octet state

• Duplet state

How does helium achieve stability despite having only two electrons?

• By having an octet configuration

• By gaining electrons from other atoms

• By having a duplet configuration

• By sharing electrons with other atoms