Question

how does the electronic configuration of an atom relate to its position in the modern periodic table?​

Answer 1

Answer:

electronic configuration tells us both the period number and the group number

Explanation:

for example Sodium

electronic configuration is 281

its position is group 1 (valency)

period 3 ( no. of shells)

thats how we find position of an atom

Answer 2

ᴛʜᴇ ᴇʟᴇᴄᴛʀᴏɴɪᴄ ᴄᴏɴғɪɢᴜʀᴀᴛɪᴏɴ ᴏғ ᴀɴ ᴀᴛᴏᴍ ʀᴇʟᴀᴛᴇs ᴛᴏ ɪᴛs ᴘᴏsɪᴛɪᴏɴ ɪɴ ᴛʜᴇ ᴍᴏᴅᴇʀɴ ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ ᴀs ᴡʜᴇɴ ᴡᴇ ᴀʀʀᴀɴɢᴇ ᴛʜᴇ ᴇʟᴇᴄᴛʀᴏɴs ɪɴ ᴛʜᴇ 1sᴛ , 2ɴᴅ , 3ʀᴅ ᴀɴᴅ 4ᴛʜ sʜᴇʟʟs ɪ.ᴇ. ... sᴏ, ɪᴛs' ᴇʟᴇᴄᴛʀᴏɴɪᴄ ᴄᴏɴғɪɢᴜʀᴀᴛɪᴏɴ ɪs 2,8,1 ᴀɴᴅ ɪᴛs ᴠᴀʟᴇɴᴄʏ ɪs +1 . ᴛʜɪs ᴇʟᴇᴍᴇɴᴛ ᴛʜᴇʀᴇғᴏʀᴇ ᴄᴏᴍᴇs ɪɴ ɢʀᴏᴜᴘ 1 ᴡɪᴛʜ +1 ᴠᴀʟᴇɴᴄʏ.

ᴛᴏ ᴋɴᴏᴡ ɪᴛs ᴘᴏsɪᴛɪᴏɴ ɪɴ ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ ғɪʀsᴛ ᴡᴇ sʜᴏᴜʟᴅ ᴋɴᴏᴡ ᴛʜᴇ ᴇʟᴇᴄᴛʀᴏɴɪᴄ ᴄᴏɴғɪɢᴜʀᴀᴛɪᴏɴ ᴏғ ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛ. ᴠᴀʟᴇɴᴄᴇ ᴇʟᴇᴄᴛʀᴏɴs: ᴛʜᴇ ᴇʟᴇᴄᴛʀᴏɴs, ᴡʜɪᴄʜ ᴀʀᴇ ᴘʀᴇsᴇɴᴛ ɪɴ ᴛʜᴇ ᴏᴜᴛᴇʀᴍᴏsᴛ sʜᴇʟʟ ᴏғ ᴀɴ ᴀᴛᴏᴍ ᴀʀᴇ ᴄᴀʟʟᴇᴅ ᴠᴀʟᴇɴᴄᴇ ᴇʟᴇᴄᴛʀᴏɴs. ... ғᴏʀ ᴀɴʏ ᴇʟᴇᴍᴇɴᴛ ᴛʜᴇ ᴠᴀʟᴇɴᴄᴇ sʜᴇʟʟ ɴᴜᴍʙᴇʀ ɪs ᴇϙᴜᴀʟ ᴛᴏ ɪᴛs ᴘᴇʀɪᴏᴅ ɴᴜᴍʙᴇʀ.