Unknown compounds can usually be identified based solely on their physical properties

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

the answer is the first option

explanation:

just googled it m8. not that hard

lol

it would be d. henry moseley

hope this !

and sorry if i'm late. have a good rest of your day! : d

gas

explanation:

smoke is the matter of a gas