1. Use molecular orbital theory to explain why the Be2 molecule does not exist.
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- ғʀᴏᴍ ᴛʜᴇ ᴇʟᴇᴄᴛʀᴏɴɪᴄ ᴄᴏɴғɪɢᴜʀᴀᴛɪᴏɴ ɪᴛ ɪs ᴄʟᴇᴀʀ ᴛʜᴀᴛ ᴛʜᴇʀᴇ ɪs ɴᴏ sɪɴɢʟʏ ғɪʟʟᴇᴅ ᴀᴛᴏᴍɪᴄ ᴏʀʙɪᴛᴀʟ ᴘʀᴇsᴇɴᴛ ɪɴ ʙᴇʀʏʟʟɪᴜᴍ. ᴡɪᴛʜᴏᴜᴛ ᴛʜᴇ ʜᴀʟғ ғɪʟʟᴇᴅ ᴏʀʙɪᴛᴀʟ,ᴛʜᴇ ᴏᴠᴇʀʟᴀᴘᴘɪɴɢ ɪs ɴᴏᴛ ᴘᴏssɪʙʟᴇ ,ᴛʜᴇʀᴇғᴏʀᴇ ʙᴇ2 ᴍᴏʟᴇᴄᴜʟᴇ ᴅᴏᴇs ɴᴏᴛ ᴇxɪsᴛ.♡
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From the electronic configuration it is clear that there is no singly filled atomic orbital present in beryllium. Without the half filled orbital,the overlapping is not possible ,therefore Be2 molecule does not exist.
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