Question

How does the atomic size vary as we go down a group and move left to right in a period ? Give reason.​

Answer 1

Answer:

ɪɴ ɢᴇɴᴇʀᴀʟ, ᴛʜᴇ ᴀᴛᴏᴍɪᴄ ʀᴀᴅɪᴜs ᴅᴇᴄʀᴇᴀsᴇs ᴀs ᴡᴇ ᴍᴏᴠᴇ ғʀᴏᴍ ʟᴇғᴛ ᴛᴏ ʀɪɢʜᴛ ɪɴ ᴀ ᴘᴇʀɪᴏᴅ ᴡɪᴛʜ ᴀɴ ɪɴᴄʀᴇᴀsᴇ ɪɴ ɴᴜᴄʟᴇᴀʀ ᴄʜᴀʀɢᴇ ᴏғ ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛ. ... ᴛʜᴇ ᴀᴛᴏᴍɪᴄ ʀᴀᴅɪᴜs ɪɴᴄʀᴇᴀsᴇs ᴡʜᴇɴ ᴡᴇ ɢᴏ ᴅᴏᴡɴ ᴀ ɢʀᴏᴜᴘ ʙᴇᴄᴀᴜsᴇ ᴏғ ᴛʜᴇ ᴀᴅᴅɪᴛɪᴏɴ ᴏғ ᴇxᴛʀᴀ sʜᴇʟʟ.

Explanation:

ɪғ ɪᴛ's ʜᴇʟᴘs,ᴛʜᴇɴ ᴘʟᴇᴀsᴇ ғᴏʟʟᴏᴡ ᴍᴇ

Answer 2

Explanation:

As we go across a period, the atomic radius decreases, that is, the atom is smaller. The outer electrons are closer to the nucleus and more strongly attracted to the center.✔️