why is the valancy of beryllium is 2
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2 electrons are in the outermost shell so to complete its duet it will donait 2 electrons. 6 electrons are in the outermost shell and to complete its octet it needs 2 electrons. hence its valency is -2.
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As Iᴛs Eʟᴇᴄᴛʀᴏɴɪᴄ Cᴏɴғɪɢᴜʀᴀᴛɪᴏɴ Sʜᴏᴡs, Bᴇʀʏʟʟɪᴜᴍ Hᴀs 2 Vᴀʟᴇɴᴄᴇ Eʟᴇᴄᴛʀᴏɴs Lᴏᴄᴀᴛᴇᴅ ɪɴ Tʜᴇ 2s Sᴜʙsʜᴇʟʟ. Tʜᴇsᴇ Eʟᴇᴄᴛʀᴏɴs Gɪᴠᴇ Bᴇʀʏʟʟɪᴜᴍ ᴀ +2 Oxɪᴅᴀᴛɪᴏɴ Sᴛᴀᴛᴇ Aɴᴅ Tʜᴇ Aʙɪʟɪᴛʏ ᴛᴏ Fᴏʀᴍ 2 Cᴏᴠᴀʟᴇɴᴛ Bᴏɴᴅs.
Hᴏᴘᴇ ɪᴛ Hᴇʟᴘs ᴜʜ......
Hᴀᴠᴇ ᴀ Gʀᴇᴀᴛ Dᴀʏ.......
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