the atomic number of element is 18 write it electronic configration to which group and block it does belong to
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The 18th element is Argon. Its electronic configuration is 2,8,8. It belongs to the third period and 18th group.
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ᴛʜᴇ 18ᴛʜ ᴇʟᴇᴍᴇɴᴛ ɪs ᴀʀɢᴏɴ. ɪᴛs ᴇʟᴇᴄᴛʀᴏɴɪᴄ ᴄᴏɴғɪɢᴜʀᴀᴛɪᴏɴ ɪs 2,8,8. ɪᴛ ʙᴇʟᴏɴɢs ᴛᴏ ᴛʜᴇ ᴛʜɪʀᴅ ᴘᴇʀɪᴏᴅ ᴀɴᴅ 18ᴛʜ ɢʀᴏᴜᴘ.
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