Question

which element has two cell both of which are completely filled with electrons

Answer 1

Neon and magnesium .............

Answer 2

$\huge\underline\mathfrak\red{answer}$

ᴛᴡᴏ sʜᴇʟʟs, ʙᴏᴛʜ ᴏғ ᴡʜɪᴄʜ ᴀʀᴇ ᴄᴏᴍᴘʟᴇᴛᴇʟʏ ғɪʟʟᴇᴅ ᴡɪᴛʜ ᴇʟᴇᴄᴛʀᴏɴs: ᴏɴʟʏ ɴᴏʙʟᴇ ɢᴀs ᴇʟᴇᴍᴇɴᴛs ʜᴀs ᴄᴏᴍᴘʟᴇᴛᴇʟʏ ғɪʟʟᴇᴅ ᴏʀʙɪᴛᴀʟs. ɴᴇᴏɴ(10)=2,8 ʜᴀs ᴛᴡᴏ sʜᴇʟʟs, ʙᴏᴛʜ ᴏғ ᴡʜɪᴄʜ ᴀʀᴇ ᴄᴏᴍᴘʟᴇᴛᴇʟʏ ғɪʟʟᴇᴅ ᴡɪᴛʜ ᴇʟᴇᴄᴛʀᴏɴs.