Question

Why the valency of carbon is 2 in the ground state?

Answer 1

general ground state of carbon is [1s2 2s2 2p2]

but in order to gain stability the carbon attains the excited state whos electronic configuration is [1s2 2s1 2p3]

and when we talk about the ground state of carbon,

as per the moeller's diagram the given electronic configuration is possessed by the carbon atom which is in ground state.

[1s2 2s2 2p2].

as the sub-shell 'p' is containing 2 elctrons which is outermost shell, the valency of carbon is 2 in the ground state.

Answer 2

Answer:

In Ground state all the atom are in their lowest possible energy levels.Although carbon has 4 valence electron but in ground state it can form only 2 bond as it has 2 unpaired electrons.

Explanation:

• Ground state is the state in which the total energy of electrons cannot be lowered further by transforming one or more electron to different orbit.
• In excited state the carbon has 4 unpaired electron so it can form four bond with other atom.
• When carbon gets excited to gain stability then it becomes-1S²,2S¹2p³
• But in general ground state the elctronic configuration of Carbon is-1S², 2S², 2p² as we can see the subshell p has 2 valence electron in the outermost shell,so the valency of carbon is 2 in ground state.