Question

when the elements will be half filled or fully filled?? with examples.​

Answer 1

Answer:

• This is because of two reasons: Symmetrical distribution: As everyone knows that symmetry leads to stability. The orbitals in which the sub-shell is exactly half-filled or completely filled are more stable because of the symmetrical distribution of electrons.

Answer 2

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• ᴛʜɪs ɪs ʙᴇᴄᴀᴜsᴇ ᴏғ ᴛᴡᴏ ʀᴇᴀsᴏɴs: sʏᴍᴍᴇᴛʀɪᴄᴀʟ ᴅɪsᴛʀɪʙᴜᴛɪᴏɴ: ᴀs ᴇᴠᴇʀʏᴏɴᴇ ᴋɴᴏᴡs ᴛʜᴀᴛ sʏᴍᴍᴇᴛʀʏ ʟᴇᴀᴅs ᴛᴏ sᴛᴀʙɪʟɪᴛʏ. ᴛʜᴇ ᴏʀʙɪᴛᴀʟs ɪɴ ᴡʜɪᴄʜ ᴛʜᴇ sᴜʙ-sʜᴇʟʟ ɪs ᴇxᴀᴄᴛʟʏ ʜᴀʟғ-ғɪʟʟᴇᴅ ᴏʀ ᴄᴏᴍᴘʟᴇᴛᴇʟʏ ғɪʟʟᴇᴅ ᴀʀᴇ ᴍᴏʀᴇ sᴛᴀʙʟᴇ ʙᴇᴄᴀᴜsᴇ ᴏғ ᴛʜᴇ sʏᴍᴍᴇᴛʀɪᴄᴀʟ ᴅɪsᴛʀɪʙᴜᴛɪᴏɴ ᴏғ ᴇʟᴇᴄᴛʀᴏɴs.
• ᴛʜᴇ ᴇxᴀᴄᴛʟʏ ʜᴀʟғ-ғɪʟʟᴇᴅ ᴀɴᴅ ғᴜʟʟʏ ғɪʟʟᴇᴅ ᴏʀʙɪᴛᴀʟs ʜᴀᴠᴇ ɢʀᴇᴀᴛᴇʀ sᴛᴀʙɪʟɪᴛʏ ᴛʜᴀɴ ᴏᴛʜᴇʀ ᴄᴏɴғɪɢᴜʀᴀᴛɪᴏɴs. ᴛʜᴇ ʀᴇᴀsᴏɴ ғᴏʀ ᴛʜᴇɪʀ sᴛᴀʙɪʟɪᴛʏ ᴀʀᴇ sʏᴍᴍᴇᴛʀʏ ᴀɴᴅ ᴇxᴄʜᴀɴɢᴇ ᴇɴᴇʀɢʏ. ᴛʜᴇ ᴇʟᴇᴄᴛʀᴏɴs ᴘʀᴇsᴇɴᴛ ɪɴ ᴛʜᴇ ᴅɪғғᴇʀᴇɴᴛ ᴏʀʙɪᴛᴀʟs ᴏғ ᴛʜᴇ sᴀᴍᴇ sᴜʙ-sʜᴇʟʟ ᴄᴀɴ ᴇxᴄʜᴀɴɢᴇ ᴛʜᴇɪʀ ᴘᴏsɪᴛɪᴏɴs.